Originally Xen PV drivers only use single-page ring to pass along
information. This might limit the throughput between frontend and
backend.

The patch extends Xenbus driver to support multi-page ring, which in
general should improve throughput if ring is the bottleneck. Changes to
various frontend / backend to adapt to the new interface are also
included.

Affected Xen drivers:
* blkfront/back
* netfront/back
* pcifront/back
* scsifront/back
* vtpmfront

The interface is documented, as before, in xenbus_client.c.
Signed-off-by: NWei Liu <wei.liu2@citrix.com>
Signed-off-by: NPaul Durrant <paul.durrant@citrix.com>
Signed-off-by: NBob Liu <bob.liu@oracle.com>
Cc: Konrad Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>

The configurations are not modified by the driver.  Make them 'const' so
that they may be placed in a read-only section.
Signed-off-by: NJosh Cartwright <joshc@ni.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Kvaser firmware can only read and write messages that are
not crossing the USB endpoint's wMaxPacketSize boundary. While
receiving commands from the CAN device, if the next command in
the same URB buffer crossed that max packet size boundary, the
firmware puts a zero-length placeholder command in its place
then moves the real command to the next boundary mark.

The driver did not recognize such behavior, leading to missing
a good number of rx events during a heavy rx load session.

Moreover, a tx URB context only gets freed upon receiving its
respective tx ACK event. Over time, the free tx URB contexts
pool gets depleted due to the missing ACK events. Consequently,
the netif transmission queue gets __permanently__ stopped; no
frames could be sent again except after restarting the CAN
newtwork interface.
Signed-off-by: NAhmed S. Darwish <ahmed.darwish@valeo.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

Upon a URB submission failure, the driver calls usb_free_urb()
but then manually frees the URB buffer by itself.  Meanwhile
usb_free_urb() has alredy freed out that transfer buffer since
we're the only code path holding a reference to this URB.

Remove two of such invalid manual free().
Signed-off-by: NAhmed S. Darwish <ahmed.darwish@valeo.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

Fixes a missing initialization of ctrlmode and ctrlmode_supported fields,
for all other CAN devices than the first one. This fix only concerns
the PCAN-USB Pro FD dual-channels CAN-FD device made by PEAK-System.
Signed-off-by: NStephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

When accessing CAN network interfaces with AF_PACKET sockets e.g. by dhclient
this can lead to a skb_under_panic due to missing skb initialisations.

Add the missing initialisations at the CAN skbuff creation times on driver
level (rx path) and in the network layer (tx path).
Reported-by: NAustin Schuh <austin@peloton-tech.com>
Reported-by: NDaniel Steer <daniel.steer@mclaren.com>
Signed-off-by: NOliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

On my test environment the throughput of a file transfer drops
from 4.4MBps to 116KBps due the number of repeated warning
messages. This patch removes the warning messages as DMA works
correctly with addresses using 0xC0000000 bits.
Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Acked-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When the driver is removed (e.g. using unbind through sysfs), the
clocks get disabled twice, once on fec_enet_close and once on
fec_drv_remove. Since the clocks are enabled only once, this leads
to a warning:

WARNING: CPU: 0 PID: 402 at drivers/clk/clk.c:992 clk_core_disable+0x64/0x68()

Remove the call to fec_enet_clk_enable in fec_drv_remove to balance
the clock enable/disable calls again. This has been introduce by
e8fcfcd5 ("net: fec: optimize the clock management to save power").
Signed-off-by: NStefan Agner <stefan@agner.ch>
Acked-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The latest spec "I-IPA01-0266-USR Rev 10" limit the MID field length to 12 bit
value. For previous versions it is 16 bit value.

This change will not break the backward compatibility as the latest ID value is
7 and with in the 12 bit value limit.
Signed-off-by: NPunnaiah Choudary Kalluri <punnaia@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

eTSEC of-nodes may have children which are not queue-group nodes. For
example new-style fixed-phy declarations. These where incorrectly
assumed to be additional queue-groups.

Change the search to filter out any nodes which are not queue-groups,
or have been disabled.
Signed-off-by: NTobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

bcmgenet_set_wol() correctly sets MPD_PW_EN when a password is specified
to match magic packets against, however, when we switch from a
password-matching to a matching without password we would leave this bit
turned on, and GENET would only match magic packets with passwords.

This can be reproduced using the following sequence:

ethtool -s eth0 wol g
ethtool -s eth0 wol s sopass 00:11:22:33:44:55
ethtool -s eth0 wol g

The simple fix is to clear the MPD_PWD_EN bit when WAKE_MAGICSECURE is
not set.

Fixes: c51de7f3 ("net: bcmgenet: add Wake-on-LAN support code")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit de7b5b3d ("net: eth: xgene: change APM X-Gene SoC platform
ethernet to support ACPI") breaks booting with devicetree with UEFI
firmware. In that case, I get:

Unhandled fault: synchronous external abort (0x96000010) at 0xfffffc0000620010
 Internal error: : 96000010 [#1] SMP
 Modules linked in: vfat fat xfs libcrc32c ahci_xgene libahci_platform libahci
 CPU: 7 PID: 634 Comm: NetworkManager Not tainted 4.0.0-rc1+ #4
 Hardware name: AppliedMicro Mustang/Mustang, BIOS 1.1.0-rh-0.14 Mar  1 2015
 task: fffffe03d4c7e100 ti: fffffe03d4e24000 task.ti: fffffe03d4e24000
 PC is at xgene_enet_rd_mcx_mac.isra.11+0x58/0xd4
 LR is at xgene_gmac_tx_enable+0x2c/0x50
 pc : [<fffffe000069d6fc>] lr : [<fffffe000069dcc4>] pstate: 80000145
 sp : fffffe03d4e27590
 x29: fffffe03d4e27590 x28: 0000000000000000
 x27: fffffe03d4e277c0 x26: fffffe03da8fda10
 x25: fffffe03d4e2760c x24: fffffe03d49e28c0
 x23: fffffc0000620004 x22: 0000000000000000
 x21: fffffc0000620000 x20: fffffc0000620010
 x19: 000000000000000b x18: 000003ffd4a96020
 x17: 000003ff7fc1f7a0 x16: fffffe000079b9cc
 x15: 0000000000000000 x14: 0000000000000000
 x13: 0000000000000000 x12: fffffe03d4e24000
 x11: fffffe03d4e27da0 x10: 0000000000000001
 x9 : 0000000000000000 x8 : fffffe03d4e27a20
 x7 : 0000000000000000 x6 : 00000000ffffffef
 x5 : fffffe000105f7d0 x4 : fffffe00007ca8c8
 x3 : fffffe03d4e2760c x2 : 0000000000000000
 x1 : fffffc0000620000 x0 : 0000000040000000

 Process NetworkManager (pid: 634, stack limit = 0xfffffe03d4e24028)
 Stack: (0xfffffe03d4e27590 to 0xfffffe03d4e28000)
 ...
 Call trace:
 [<fffffe000069d6fc>] xgene_enet_rd_mcx_mac.isra.11+0x58/0xd4
 [<fffffe000069dcc0>] xgene_gmac_tx_enable+0x28/0x50
 [<fffffe00006a112c>] xgene_enet_open+0x2c/0x130
 [<fffffe00007b9254>] __dev_open+0xc8/0x148
 [<fffffe00007b956c>] __dev_change_flags+0x90/0x158
 [<fffffe00007b9664>] dev_change_flags+0x30/0x70
 [<fffffe00007c8ab8>] do_setlink+0x278/0x870
 [<fffffe00007c95bc>] rtnl_newlink+0x404/0x6a8
 [<fffffe00007c8040>] rtnetlink_rcv_msg+0x98/0x218
 [<fffffe00007e78e4>] netlink_rcv_skb+0xe0/0xf8
 [<fffffe00007c7f94>] rtnetlink_rcv+0x30/0x44
 [<fffffe00007e6f2c>] netlink_unicast+0xfc/0x210
 [<fffffe00007e75b8>] netlink_sendmsg+0x498/0x5ac
 [<fffffe00007990b8>] do_sock_sendmsg+0xa4/0xcc
 [<fffffe000079a958>] ___sys_sendmsg+0x1fc/0x208
 [<fffffe000079b984>] __sys_sendmsg+0x4c/0x94
 [<fffffe000079b9f8>] SyS_sendmsg+0x2c/0x3c

The problem here is that the enet hw clocks are not getting
initialized because of a test to avoid the initialization if
UEFI is used to boot. This is an incorrect test. When booting
with UEFI and devicetree, the kernel must still initialize
the enet hw clocks. If booting with ACPI, the clock hw is
not exposed to the kernel and it is that case where we want
to avoid initializing clocks.
Signed-off-by: NMark Salter <msalter@redhat.com>
Acked-by: NFeng Kan <fkan@apm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

EEH recovery for bnx2x based adapters is not reliable on all Power
systems using the default hot reset, which can result in an
unrecoverable EEH error. Forcing the use of fundamental reset
during EEH recovery fixes this.

Cc: stable<stable@vger.kernel.org>
Signed-off-by: NBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When handling a from-guest frag list, xenvif_handle_frag_list()
replaces the frags before calling the destructor to clean up the
original (foreign) frags.  Whilst this is safe (the destructor doesn't
actually use the frags), it looks odd.

Reorder the function to be less confusing.
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Every time a VIF is destroyed up to 256 pages may be leaked if packets
with more than MAX_SKB_FRAGS frags were transmitted from the guest.
Even worse, if another user of ballooned pages allocated one of these
ballooned pages it would not handle the unexpectedly >1 page count
(e.g., gntdev would deadlock when unmapping a grant because the page
count would never reach 1).

When handling a from-guest skb with a frag list, unref the frags
before releasing them so they are freed correctly when the VIF is
destroyed.
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use correct pointer arithmetic to get the pointer to each stat.
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

I recently did a rework of the smc91x driver and did some build-testing
by compiling hundreds of randconfig kernels. Unfortunately, my script
was wrong and did not actually test the configurations that mattered,
so I introduced stupid typos in almost every file I touched.

I fixed my script now, built all configurations that actually matter
and fixed all the typos, this is the result.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: b70661c7 ("net: smc91x: use run-time configuration on all ARM machines")
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently the list is traversed using rcu variant. That is not correct
since dev_set_mac_address can be called which eventually calls
rtmsg_ifinfo_build_skb and there, skb allocation can sleep. So fix this
by remove the rcu usage here.

Fixes: 3d249d4c "net: introduce ethernet teaming device"
Signed-off-by: NJiri Pirko <jiri@resnulli.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When do suspend/resume stress test, some log shows "rcv is not +last".
The issue is that enet suspend will disable phy clock, phy link down,
after resume back, enet MAC redo initial and ready to tx/rx packet,
but phy still is not ready which is doing auto-negotiation. When phy
link is not up, don't schdule napi soft irq.

[Peter]
It has fixed kernel panic after long time suspend/resume test
with nfs rootfs.

[ 8864.429458] fec 2188000.ethernet eth0: rcv is not +last
[ 8864.434799] fec 2188000.ethernet eth0: rcv is not +last
[ 8864.440088] fec 2188000.ethernet eth0: rcv is not +last
[ 8864.445424] fec 2188000.ethernet eth0: rcv is not +last
[ 8864.450782] fec 2188000.ethernet eth0: rcv is not +last
[ 8864.456111] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 8864.464225] pgd = 80004000
[ 8864.466997] [00000000] *pgd=00000000
[ 8864.470627] Internal error: Oops: 17 [#1] SMP ARM
[ 8864.475353] Modules linked in: evbug
[ 8864.479006] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.0.0-rc1-00044-g7a2a1d2 #234
[ 8864.486854] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 8864.492709] task: be069380 ti: be07a000 task.ti: be07a000
[ 8864.498137] PC is at memcpy+0x80/0x330
[ 8864.501919] LR is at gro_pull_from_frag0+0x34/0xa8
[ 8864.506735] pc : [<802bb080>]    lr : [<8057c204>]    psr: 00000113
[ 8864.506735] sp : be07bbd4  ip : 00000010  fp : be07bc0c
[ 8864.518235] r10: 0000000e  r9 : 00000000  r8 : 809c7754
[ 8864.523479] r7 : 809c7754  r6 : bb43c040  r5 : bd280cc0  r4 : 00000012
[ 8864.530025] r3 : 00000804  r2 : fffffff2  r1 : 00000000  r0 : bb43b83c
[ 8864.536575] Flags: nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[ 8864.543904] Control: 10c5387d  Table: bd14c04a  DAC: 00000015
[ 8864.549669] Process ksoftirqd/0 (pid: 3, stack limit = 0xbe07a210)
[ 8864.555869] Stack: (0xbe07bbd4 to 0xbe07c000)
[ 8864.560250] bbc0:                                              bd280cc0 bb43c040 809c7754
[ 8864.568455] bbe0: 809c7754 bb43b83c 00000012 8057c204 00000000 bd280cc0 bd8a0718 00000003
[ 8864.576658] bc00: be07bc5c be07bc10 8057ebf0 8057c1dc 00000000 00000000 8057ecc4 bef59760
[ 8864.584863] bc20: 00000002 bd8a0000 be07bc64 809c7754 00000000 bd8a0718 bd280cc0 bd8a0000
[ 8864.593066] bc40: 00000000 0000001c 00000000 bd8a0000 be07bc74 be07bc60 8057f148 8057eb90
[ 8864.601268] bc60: bf0810a0 00000000 be07bcf4 be07bc78 8044e7b4 8057f12c 00000000 8007df6c
[ 8864.609470] bc80: bd8a0718 00000040 00000000 bd280a80 00000002 00000019 bd8a0600 bd8a1214
[ 8864.617672] bca0: bd8a0690 bf0810a0 00000000 00000000 bd8a1000 00000000 00000027 bd280cc0
[ 8864.625874] bcc0: 80062708 800625cc 000943db bd8a0718 00000001 000d1166 00000040 be7c1ec0
[ 8864.634077] bce0: 0000012c be07bd00 be07bd3c be07bcf8 8057fc98 8044e3ac 809c2ec0 3ddff000
[ 8864.642280] bd00: be07bd00 be07bd00 be07bd08 be07bd08 00000000 00000020 809c608c 00000003
[ 8864.650481] bd20: 809c6080 40000001 809c6088 00200100 be07bd84 be07bd40 8002e690 8057fac8
[ 8864.658684] bd40: be07bd64 be07bd50 00000001 04208040 000d1165 0000000a be07bd84 809c0d7c
[ 8864.666885] bd60: 00000000 809c6af8 00000000 00000001 be008000 00000000 be07bd9c be07bd88
[ 8864.675087] bd80: 8002eb64 8002e564 00000125 809c0d7c be07bdc4 be07bda0 8006f100 8002eaac
[ 8864.683291] bda0: c080e10c be07bde8 809c6c6c c080e100 00000002 00000000 be07bde4 be07bdc8
[ 8864.691492] bdc0: 800087a0 8006f098 806f2934 20000013 ffffffff be07be1c be07be44 be07bde8
[ 8864.699695] bde0: 800133a4 80008784 00000001 00000001 00000000 00000000 be7c1680 00000000
[ 8864.707896] be00: be0cfe00 bd93eb40 00000002 00000000 00000000 be07be44 be07be00 be07be30
[ 8864.716098] be20: 8006278c 806f2934 20000013 ffffffff be069380 be7c1680 be07be7c be07be48
[ 8864.724300] be40: 80049cfc 806f2910 00000001 00000000 80049cb4 00000000 be07be7c be7c1680
[ 8864.732502] be60: be3289c0 be069380 bd23b600 be0cfe00 be07bebc be07be80 806ed614 80049c68
[ 8864.740706] be80: be07a000 0000020a 809c608c 00000003 00000001 8002e858 be07a000 be035740
[ 8864.748907] bea0: 00000000 00000001 809d4598 00000000 be07bed4 be07bec0 806edd0c 806ed440
[ 8864.757110] bec0: be07a000 be07a000 be07bee4 be07bed8 806edd68 806edcf0 be07bef4 be07bee8
[ 8864.765311] bee0: 8002e860 806edd34 be07bf24 be07bef8 800494b0 8002e828 be069380 00000000
[ 8864.773512] bf00: be035780 be035740 8004938c 00000000 00000000 00000000 be07bfac be07bf28
[ 8864.781715] bf20: 80045928 80049398 be07bf44 00000001 00000000 be035740 00000000 00030003
[ 8864.789917] bf40: dead4ead ffffffff ffffffff 80a2716c 80b59b00 00000000 8088c954 be07bf5c
[ 8864.798120] bf60: be07bf5c 00000000 00000000 dead4ead ffffffff ffffffff 80a2716c 00000000
[ 8864.806320] bf80: 00000000 8088c954 be07bf88 be07bf88 be035780 8004584c 00000000 00000000
[ 8864.814523] bfa0: 00000000 be07bfb0 8000ed10 80045858 00000000 00000000 00000000 00000000
[ 8864.822723] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8864.830925] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 5ffbb5f7 f9fcf5e7
[ 8864.839115] Backtrace:
[ 8864.841631] [<8057c1d0>] (gro_pull_from_frag0) from [<8057ebf0>] (dev_gro_receive+0x6c/0x3f8)
[ 8864.850173]  r6:00000003 r5:bd8a0718 r4:bd280cc0 r3:00000000
[ 8864.855958] [<8057eb84>] (dev_gro_receive) from [<8057f148>] (napi_gro_receive+0x28/0xac)
[ 8864.864152]  r10:bd8a0000 r9:00000000 r8:0000001c r7:00000000 r6:bd8a0000 r5:bd280cc0
[ 8864.872115]  r4:bd8a0718
[ 8864.874713] [<8057f120>] (napi_gro_receive) from [<8044e7b4>] (fec_enet_rx_napi+0x414/0xc74)
[ 8864.883167]  r5:00000000 r4:bf0810a0
[ 8864.886823] [<8044e3a0>] (fec_enet_rx_napi) from [<8057fc98>] (net_rx_action+0x1dc/0x2ec)
[ 8864.895016]  r10:be07bd00 r9:0000012c r8:be7c1ec0 r7:00000040 r6:000d1166 r5:00000001
[ 8864.902982]  r4:bd8a0718
[ 8864.905570] [<8057fabc>] (net_rx_action) from [<8002e690>] (__do_softirq+0x138/0x2c4)
[ 8864.913417]  r10:00200100 r9:809c6088 r8:40000001 r7:809c6080 r6:00000003 r5:809c608c
[ 8864.921382]  r4:00000020
[ 8864.923966] [<8002e558>] (__do_softirq) from [<8002eb64>] (irq_exit+0xc4/0x138)
[ 8864.931289]  r10:00000000 r9:be008000 r8:00000001 r7:00000000 r6:809c6af8 r5:00000000
[ 8864.939252]  r4:809c0d7c
[ 8864.941841] [<8002eaa0>] (irq_exit) from [<8006f100>] (__handle_domain_irq+0x74/0xe8)
[ 8864.949688]  r4:809c0d7c r3:00000125
[ 8864.953342] [<8006f08c>] (__handle_domain_irq) from [<800087a0>] (gic_handle_irq+0x28/0x68)
[ 8864.961707]  r9:00000000 r8:00000002 r7:c080e100 r6:809c6c6c r5:be07bde8 r4:c080e10c
[ 8864.969597] [<80008778>] (gic_handle_irq) from [<800133a4>] (__irq_svc+0x44/0x5c)
[ 8864.977097] Exception stack(0xbe07bde8 to 0xbe07be30)
[ 8864.982173] bde0:                   00000001 00000001 00000000 00000000 be7c1680 00000000
[ 8864.990377] be00: be0cfe00 bd93eb40 00000002 00000000 00000000 be07be44 be07be00 be07be30
[ 8864.998573] be20: 8006278c 806f2934 20000013 ffffffff
[ 8865.003638]  r7:be07be1c r6:ffffffff r5:20000013 r4:806f2934
[ 8865.009447] [<806f2904>] (_raw_spin_unlock_irq) from [<80049cfc>] (finish_task_switch+0xa0/0x160)
[ 8865.018334]  r4:be7c1680 r3:be069380
[ 8865.021993] [<80049c5c>] (finish_task_switch) from [<806ed614>] (__schedule+0x1e0/0x5dc)
[ 8865.030098]  r8:be0cfe00 r7:bd23b600 r6:be069380 r5:be3289c0 r4:be7c1680
[ 8865.036942] [<806ed434>] (__schedule) from [<806edd0c>] (preempt_schedule_common+0x28/0x44)
[ 8865.045307]  r9:00000000 r8:809d4598 r7:00000001 r6:00000000 r5:be035740 r4:be07a000
[ 8865.053197] [<806edce4>] (preempt_schedule_common) from [<806edd68>] (_cond_resched+0x40/0x48)
[ 8865.061822]  r4:be07a000 r3:be07a000
[ 8865.065472] [<806edd28>] (_cond_resched) from [<8002e860>] (run_ksoftirqd+0x44/0x64)
[ 8865.073252] [<8002e81c>] (run_ksoftirqd) from [<800494b0>] (smpboot_thread_fn+0x124/0x190)
[ 8865.081550] [<8004938c>] (smpboot_thread_fn) from [<80045928>] (kthread+0xdc/0xf8)
[ 8865.089133]  r10:00000000 r9:00000000 r8:00000000 r7:8004938c r6:be035740 r5:be035780
[ 8865.097097]  r4:00000000 r3:be069380
[ 8865.100752] [<8004584c>] (kthread) from [<8000ed10>] (ret_from_fork+0x14/0x24)
[ 8865.107990]  r7:00000000 r6:00000000 r5:8004584c r4:be035780
[ 8865.113767] Code: e320f000 e4913004 e4914004 e4915004 (e4916004)
[ 8865.120006] ---[ end trace b0a4c6bd499288ca ]---
[ 8865.124697] Kernel panic - not syncing: Fatal exception in interrupt
[ 8865.131084] ---[ end Kernel panic - not syncing: Fatal exception in interrupt

Cc: [v3.19+] stable@vger.kernel.org
Tested-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch fixes the backward compatibile of the older driver with the
newer firmware by making the binding unique so that the older driver won't
recognize the non-supported interfaces.
Signed-off-by: NIyappan Subramanian <isubramanian@apm.com>
Signed-off-by: NKeyur Chudgar <kchudgar@apm.com>
Tested-by: NMark Langsdorf <mlangsdo@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In case there was some tx buffer reclaimed and not enough rx packets
to consume the whole budget, napi_complete would not be called and
interrupts would be kept disabled, effectively resulting in the
network core never to call the poll callback again and no rx/tx
interrupts to be fired either.

Fix that by only accounting the rx work done in the poll callback.
Signed-off-by: NNicolas Schichan <nschichan@freebox.fr>
Acked-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently we're getting IRQs after lots of resources are already
allocated:
 * netdev
 * clocks
 * MDIO bus
Also HW gets initialized by the time when checking IRQs as well.

Now there's a possibility for master interrupt controller to be not
probed yet. This will lead to exit from GMAC probe routine with "-
EPROBE_DEFER" and so deferred probe will hapen later on.

But since we exited the first GMAC probe without release of all
allocated resources there could be conflicts on subsequent probes.

For example this is what happens for me:
 --->8---
 stmmaceth e0018000.ethernet: no reset control found
 stmmac - user ID: 0x10, Synopsys ID: 0x37
  Ring mode enabled
  DMA HW capability register supported
  Normal descriptors
  RX Checksum Offload Engine supported (type 2)
  TX Checksum insertion supported
  Enable RX Mitigation via HW Watchdog Timer
 libphy: stmmac: probed
 eth0: PHY ID 20005c7a at 1 IRQ POLL (stmmac-0:01) active
 platform e0018000.ethernet: Driver stmmaceth requests probe deferral
 ...
 ...
 ...
 stmmaceth e0018000.ethernet: no reset control found
 stmmac - user ID: 0x10, Synopsys ID: 0x37
  Ring mode enabled
  DMA HW capability register supported
  Normal descriptors
  RX Checksum Offload Engine supported (type 2)
  TX Checksum insertion supported
  Enable RX Mitigation via HW Watchdog Timer
 ------------[ cut here ]------------
 WARNING: CPU: 0 PID: 6 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x4e/0x68()
 sysfs: cannot create duplicate filename
'/devices/platform/axs10x_mb/e0018000.ethernet/mdio_bus/stmmac-0'
 CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 4.0.0-rc1-next-20150303+#8
 Workqueue: deferwq deferred_probe_work_func

 Stack Trace:
  arc_unwind_core+0xb8/0x114
  warn_slowpath_common+0x5a/0x8c
  warn_slowpath_fmt+0x2e/0x38
  sysfs_warn_dup+0x4e/0x68
  sysfs_create_dir_ns+0x98/0xa0
  kobject_add_internal+0x8c/0x2e8
  kobject_add+0x4a/0x8c
  device_add+0xc6/0x448
  mdiobus_register+0x6c/0x164
  stmmac_mdio_register+0x112/0x264
  stmmac_dvr_probe+0x6c0/0x85c
  stmmac_pltfr_probe+0x2e4/0x50c
  platform_drv_probe+0x26/0x5c
  really_probe+0x76/0x1dc
  bus_for_each_drv+0x42/0x7c
  device_attach+0x64/0x6c
  bus_probe_device+0x74/0xa4
  deferred_probe_work_func+0x50/0x84
  process_one_work+0xf8/0x2cc
  worker_thread+0x110/0x478
  kthread+0x8a/0x9c
  ret_from_fork+0x14/0x18
 ---[ end trace a2dfaa7d630c8be1 ]---
 ------------[ cut here ]------------
 WARNING: CPU: 0 PID: 6 at lib/kobject.c:240
kobject_add_internal+0x218/0x2e8()
 kobject_add_internal failed for stmmac-0 with -EEXIST, don't try to
register things with the same name in the same di.
 CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G        W
4.0.0-rc1-next-20150303+ #8
 Workqueue: deferwq deferred_probe_work_func

 Stack Trace:
  arc_unwind_core+0xb8/0x114
  warn_slowpath_common+0x5a/0x8c
  warn_slowpath_fmt+0x2e/0x38
  kobject_add_internal+0x218/0x2e8
  kobject_add+0x4a/0x8c
  device_add+0xc6/0x448
  mdiobus_register+0x6c/0x164
  stmmac_mdio_register+0x112/0x264
  stmmac_dvr_probe+0x6c0/0x85c
  stmmac_pltfr_probe+0x2e4/0x50c
  platform_drv_probe+0x26/0x5c
  really_probe+0x76/0x1dc
  bus_for_each_drv+0x42/0x7c
  device_attach+0x64/0x6c
  bus_probe_device+0x74/0xa4
  deferred_probe_work_func+0x50/0x84
  process_one_work+0xf8/0x2cc
  worker_thread+0x110/0x478
  kthread+0x8a/0x9c
  ret_from_fork+0x14/0x18
 ---[ end trace a2dfaa7d630c8be2 ]---
 libphy: mii_bus stmmac-0 failed to register
 : Cannot register as MDIO bus
 stmmac_pltfr_probe: main driver probe failed
 stmmaceth: probe of e0018000.ethernet failed with error -22
 --->8---

Essential fix is to check for IRQs availability as early as possible and
then safely go to deferred probe if IRQs are not there yet.
Signed-off-by: NAlexey Brodkin <abrodkin@synopsys.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Sonic Zhang <sonic.zhang@analog.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 6ce29b0e ("gianfar: Avoid unnecessary reg accesses in adjust_link()")
eliminates unnecessary calls to adjust_link for phy devices which don't support
interrupts and need polling. As part of that work, the 'new_state' local flag,
which was used to reduce logging noise on the console, was eliminated.

Unfortunately, that means that a 'Link is Down' log message will now be
issued continuously if a link is configured as UP, the link state is down,
and the associated phy requires polling. This occurs because priv->oldduplex
is -1 in this case, which always differs from phydev->duplex. In addition,
phydev->speed may also differ from priv->oldspeed.  gfar_update_link_state()
is therefore called each time a phy is polled, even if the link state did not
change.

Cc: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Reviewed-by: NClaudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add a function that will enable changing the MAC address
of an ibmveth interface while it is still running.
Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Reviewed-by: NJiri Pirko <jiri@resnulli.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

My previous fix to clear padding of short frames used skb->len as the
DMA length, assuming that skb_padto() extended skb->len to include the
padding.  That isn't the case; we need to use skb_put_padto() instead.

(This wasn't immediately obvious because software padding isn't
actually needed on the R-Car H2.  We could make it conditional on
which chip is being driven, but it's probably not worth the effort.)
Reported-by: N"Violeta Menéndez González" <violeta.menendez@codethink.co.uk>
Fixes: 612a17a54b50 ("sh_eth: Fix padding of short frames on TX")
Signed-off-by: NBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This reverts commit fd9af07c.

The hardware manual states that the frame error and multicast bits are
copied to bits 9:0 of RD0, not bits 25:16.  I've tested that this is
true for RFS1 (CRC error), RFS3 (frame too short), RFS4 (frame too
long) and RFS8 (multicast).

Also adjust a comment to agree with this.
Signed-off-by: NBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In case of RX ring underrun (RDE), we attempt to reset the software
descriptor pointers (dirty_rx and cur_rx) to match where the hardware
will read the next descriptor from, as that might not be the first
dirty descriptor.  This relies on reading RDFAR, but that register
doesn't exist on all supported chips - specifically, not on the R-Car
chips.  This will result in unpredictable behaviour on those chips
after an RDE.

Make this pointer reset conditional and assume that it isn't needed on
the R-Car chips.  This fix also assumes that RDFAR is never exposed at
offset 0 in the memory map - this is currently true, and a subsequent
commit will fix the ambiguity between offset 0 and no-offset in the
register offset maps.

Fixes: 79fba9f5 ("net: sh_eth: fix the rxdesc pointer when rx ...")
Signed-off-by: NBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When submitting a DMA descriptor, the active bit must be written last.
When reading a completed DMA descriptor, the active bit must be read
first.

Add memory barriers to ensure that this ordering is maintained.
Signed-off-by: NBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Packets which are sent from the selftest (ethtool) flow,
should not be passed to GRO stack but rather dropped by
the driver after validation. To achieve that, we disable
GRO for the duration of the selftest.

Fixes: dd65beac ("net/mlx4_en: Extend usage of napi_gro_frags")
Reported-by: NCarol Soto <clsoto@linux.vnet.ibm.com>
Signed-off-by: NIdo Shamay <idos@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The bit mask for currently supported driver features (MLX4_UPDATE_QP_SUPPORTED_ATTRS)
of the update-qp command was defined twice (using enum value and pre-processor
define directive) and wrong.

The return value of the call to mlx4_update_qp() from within the SRIOV
resource-tracker was wrongly voided down.

Fix both issues.

issue: none
Fixes: 09e05c3f ('net/mlx4: Set vlan stripping policy by the right command')
Fixes: ce8d9e0d ('net/mlx4_core: Add UPDATE_QP SRIOV wrapper support')
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 60b4ea17 ("net: systemport: log RX buffer allocation and RX/TX DMA
failures") added a few software maintained statistics using
BCM_SYSPORT_STAT_MIB_RX and BCM_SYSPORT_STAT_MIB_TX. These statistics are read
from the hardware MIB counters, such that bcm_sysport_update_mib_counters() was
trying to read from a non-existing MIB offset for these counters.

Fix this by introducing a special type: BCM_SYSPORT_STAT_SOFT, similar to
BCM_SYSPORT_STAT_NETDEV, such that bcm_sysport_get_ethtool_stats will read from
the software mib.

Fixes: 60b4ea17 ("net: systemport: log RX buffer allocation and RX/TX DMA failures")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 44c8bc3c ("net: bcmgenet: log RX buffer allocation and RX/TX dma
failures") added a few software maintained statistics using
BCMGENET_STAT_MIB_RX and BCMGENET_STAT_MIB_TX. These statistics are read from
the hardware MIB counters, such that bcmgenet_update_mib_counters() was trying
to read from a non-existing MIB offset for these counters.

Fix this by introducing a special type: BCMGENET_STAT_SOFT, similar to
BCMGENET_STAT_NETDEV, such that bcmgenet_get_ethtool_stats will read from the
software mib.

Fixes: 44c8bc3c ("net: bcmgenet: log RX buffer allocation and RX/TX dma failures")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change 'mutliple' to 'multiple'
Change 'Firmare' to 'Firmware'
Signed-off-by: NYannick Guerrini <yguerrini@tomshardware.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change 'Firmare' to 'Firmware'
Signed-off-by: NYannick Guerrini <yguerrini@tomshardware.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Setting a dev_pm_ops suspend/resume pair but not a set of
hibernation functions means those pm functions will not be
called upon hibernation.
Fix this by using SIMPLE_DEV_PM_OPS, which appropriately
assigns the suspend and hibernation handlers and move
cpsw_suspend/resume calbacks under CONFIG_PM_SLEEP
to avoid build warnings.
Signed-off-by: NGrygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>