This patch removes ARPHRD_IEEE802154 from addrconf handling. In the
earlier days of 802.15.4 6LoWPAN, the interface type was ARPHRD_IEEE802154
which introduced several issues, because 802.15.4 interfaces used the
same type.

Since commit 965e613d ("ieee802154: 6lowpan: fix ARPHRD to
ARPHRD_6LOWPAN") we use ARPHRD_6LOWPAN for 6LoWPAN interfaces. This
patch will remove ARPHRD_IEEE802154 which is currently deadcode, because
ARPHRD_IEEE802154 doesn't reach the minimum 1280 MTU of IPv6.

Also we use 6LoWPAN EUI64 specific defines instead using link-layer
constanst from 802.15.4 link-layer header.

Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

AVB-DMAC Receive FIFO Warning interrupt is not enabled, so it is not
necessary to disable the interrupt in ravb_close().
On the other hand, this patch disables the interrupt in ravb_dmac_init() to
prevent the possibility that the interrupt is issued by the state that
a boot loader left.
Signed-off-by: NKazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
Acked-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

bd1060a1 ("sock, cgroup: add sock->sk_cgroup") added global
spinlock cgroup_sk_update_lock but erroneously skipped initializer
leading to uninitialized spinlock warning.  Fix it by using
DEFINE_SPINLOCK().
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NDexuan Cui <decui@microsoft.com>
Fixes: bd1060a1 ("sock, cgroup: add sock->sk_cgroup")
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some eisa_driver structures used __init probe functions which generates
a warning and could crash if function is called after being deleted.
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In commit 2a04ae8a ("hv_netvsc: remove locking in netvsc_send()"), the
locking for MSD (Multi-Send Data) field was removed. This could cause a
race condition between RNDIS control messages and data packets processing,
because these two types of traffic are not synchronized.
This patch fixes this issue by sending control messages out directly
without reading MSD field.
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support to enable and disable UDP checksums via netlink. This is
similar to how VXLAN and GUE allow this. This includes support for
enabling the UDP zero checksum (for both TX and RX).
Signed-off-by: NTom Herbert <tom@herbertland.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixe a couple of cast errors found by sparse.
Signed-off-by: NTom Herbert <tom@herbertland.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2015-12-13

This series contains updates to fm10k only.

Jacob updates the driver to use ether_addr_copy() instead of copying
byte-by-byte in a for loop.  Fixed up CamelCase variable names and coding
style issues.  Cleaned up namespace pollution of fm10k_iov_msg_data_pf().
Cleaned up, by making it consistent, the use of VLAN and VLAN ID instead of
vlan or vid.  Lastly, update the driver to initialize XPS so that we can
take advantage of the kernel feature.

Alex Duyck fixed up the driver to free the resources associated with the
MSI-X vector table if the q_vector allocation failed.  Then fixed the driver
to check for msix_entries to be NULL and freed the IRQ if the mailbox API
returned an error on trying to connect.

Bruce cleans up whitespace and namespace pollution issues in the driver.
Also updates the driver to use the BIT() macro instead of bit-shifting coding.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Similar to ixgbe and i40e, initialize XPS on driver load so that we can
take advantage of this kernel feature.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Make functions that should be static.  While we're at it, fix the function
header comment for fm10k_tlv_attr_nest_stop(), and update the copyright
header for fm10k_pf.h, fm10k_tlv.c and fm10k_tlv.h.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The function declaration does not need to be 'inline'd here.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch addresses two issues.

First is the fact that the fm10k_mbx_free_irq was assuming msix_entries was
valid and that will not always be the case.  As such we need to add a check
for if it is NULL.

Second is the fact that we weren't freeing the IRQ if the mailbox API
returned an error on trying to connect.
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Reviewed-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

If the q_vector allocation fails we should free the resources associated
with the MSI-X vector table.
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Reviewed-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Rather than wrapping fm10k_dcbnl.c and fm10k_debugfs.c support with
 #ifdef blocks, just conditionally include the .o files in the Makefile.
Also, since we're modifying it, update the copyright year on the
Makefile.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

We haven't bumped the driver version in a while despite many fixes being
pulled in from the out-of-tree Sourceforge driver. Update the version to
match.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Instead of using lowercase vlan, vid, or VID, always use VLAN or VLAN ID
in comments when referring to VLANs. The original driver code was
consistent, but recent patches have not been as consistent with this
naming scheme.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Improve code style by removing the unnecessary else block of an if
statement which immediately returns.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Avoid the use of CamelCase for some variable names that previously
slipped through review.
Reported-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Use the ether_addr_copy function instead of copying byte-by-byte in a
for-loop by hand.
Reported-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Jeff Kirsher says:

====================
1GbE Intel Wired LAN Driver Updates 2015-12-12

This series contains updates to e1000, e1000e and igb.

Joern Engel fixes up the e1000 driver to reduce scheduler latencies by
making the eeprom read/write functions scheduler friendly by using a mutex
lock instead of a spin lock.

Todd adds code for igb to initialize the 88E1543 PHY properly.  Then fixed
igb to use the correct i210 register for EEMNGCTL, since the i210 has two
EEPROM access registers (EEARBC and EEMNGCTL).

Dmitry Vyukov provides a fix for e1000 to resolve a data race found with
KernelThreadSanitizer (KTSAN), where no memory barriers were being used
when buffers get recycled, so the recycled buffers can be corrupted.  So
use smp_store_release() to update tx_ring->next_to_clean and
smp_load_acquire() to read tx_ring->next_to_clean to properly hand off
buffers from e1000_clean_tx_irq() to e1000_xmit_frame().

Jarod Wilson fixes igb so that we do not try to unmap a NULL hw_addr.  Then
cleaned up array_rd32() so that it uses igb_rd32() the same as rd32() and
use io_addr() in more places so that we do not have to call E1000_REMOVED().

Janusz Wolak cleans up the e1000 driver by correcting warnings produced
by checkpatch.pl for the driver.

Jean Sacren provides several patches with general cleanups for e1000 and
e1000e, which include code comment fix-ups and cleanup of local variables
not needed.

Dmitry Fleytman fixes a possible division by zero in the receive interrupt
handler for e1000e when working without adaptive interrupt moderation,
which is typically disabled on jumbo MTUs.

Raanan increases the timeout of the polling bit due to timing changes to
the ME firmware on a platform, so increase the timeout to 300ms.  Added
initial support for i219-LM, which is a LOM that will be available on
systems with the Lewisburg Platform Controller HUB (PCH) chipset.

Jan Beulich fixes a NULL dereference in igb, due to the adapter->vf _data
being NULL while adapter->vfs_allocated_count is non-zero.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

i219-LM (3) is a LOM that will be available on systems with the
Lewisburg Platform Controller Hub (PCH) chipset from Intel.
This patch provides the initial support for the device.
Signed-off-by: NRaanan Avargil <raanan.avargil@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Clean up array_rd32 so that it uses igb_rd32 the same as rd32, per the
suggestion of Alexander Duyck, and use io_addr in more places, so that
we don't have the need to call E1000_REMOVED (which simply looks for a
null hw_addr) nearly as much.
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Acked-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2015-12-12

This series contains updates to i40e and i40evf only.

Jesse fixes some trivial static analyzer warnings where BIT() can be used
instead of BIT_ULL().

Mitch fixes the virtual channel interface which was using incorrect semantics
to remove MAC addresses and would leave incorrect filters active when using
VLANs.  Also fixes an issue that when VF's are created, the MAC address
defaults to all zeros, indicating to the VF driver that it should use a
random MAC address.  However, the PF driver was incorrectly adding this
zero MAC to the filter table, so check for a good address before adding
the default filter.  Adds a check to make sure that the Tx and Rx rings
actually exist before dereferencing them to free resources.  Re-classifies
several messages which are really for debugging purposes, especially since
the driver can fully recover from any of these.  Fixed up the VF version
strings to match the PF driver.

Anjali adds a virtchnl offload to support the expanded version of TCP/UDP
PCTYPES for RSS.

Shannon fixes i40e to clean the whole MAC filter list when resetting after
an intermediate add or delete push to the firmware.

v2: added blank line after variable declaration in patch 9 based on
    feedback from Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The combined effect of commits 6423fc34 ("igb: do not re-init SR-IOV
during probe") and ceee3450 ("igb: make sure SR-IOV init uses the
right number of queues") causes VFs no longer getting set up, leading
to NULL pointer dereferences due to the adapter's ->vf_data being NULL
while ->vfs_allocated_count is non-zero. The first commit not only
neglected the side effect of igb_sriov_reinit() that the second commit
tried to account for, but also that of setting IGB_FLAG_HAS_MSIX,
without which igb_enable_sriov() is effectively a no-op. Calling
igb_{,re}set_interrupt_capability() as done here seems to address this,
but I'm not sure whether this is better than sinply reverting the other
two commits.
Signed-off-by: NJan Beulich <jbeulich@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Due to timing changes to the ME firmware in Skylake, this timer
needs to be increased to 300ms.
Signed-off-by: NRaanan Avargil <raanan.avargil@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch fixes possible division by zero in receive
interrupt handler when working without adaptive interrupt
moderation.

The adaptive interrupt moderation mechanism is typically
disabled on jumbo MTUs.
Signed-off-by: NDmitry Fleytman <dmitry@daynix.com>
Signed-off-by: NLeonid Bloch <leonid@daynix.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NJanusz Wolak <januszvdm@gmail.com>
Acked-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

By using goto statement, we can achieve sharing the same exit path so
that code duplication could be minimized.
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Due to historical reason, 'phy_data' has never been included in the
kernel doc. Fix it so that the requirement could be fulfilled.
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The local variable 'ret' doesn't serve much purpose so we might as well
clean it up.
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Use 'That' to replace 'The' so that the comment would make sense.
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The checking logic needed some clean-up work, so we rewrite it by
checking for break first. With that change in place, we can even move
the second check for goto statement outside of the loop.

As this is merely a cleanup, no functional change is involved. The
questionable 'tmp != 0xFF' is intentionally left alone.

Mark Rustad and Alexander Duyck contributed to this patch.

CC: Mark Rustad <mark.d.rustad@intel.com>
CC: Alex Duyck <aduyck@mirantis.com>
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The i210 has two EEPROM access registers that are located in
non-standard offsets: EEARBC and EEMNGCTL. EEARBC was fixed previously
and EEMNGCTL should also be corrected.
Reported-by: NRoman Hodek <roman.aud@siemens.com>
Signed-off-by: NTodd Fujinaka <todd.fujinaka@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NJanusz Wolak <januszvdm@gmail.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

I've got a startech thunderbolt dock someone loaned me, which among other
things, has the following device in it:

08:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)

This hotplugs just fine (kernel 4.2.0 plus a patch or two here):

[  863.020315] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.2.18-k
[  863.020316] igb: Copyright (c) 2007-2014 Intel Corporation.
[  863.028657] igb 0000:08:00.0: enabling device (0000 -> 0002)
[  863.062089] igb 0000:08:00.0: added PHC on eth0
[  863.062090] igb 0000:08:00.0: Intel(R) Gigabit Ethernet Network Connection
[  863.062091] igb 0000:08:00.0: eth0: (PCIe:2.5Gb/s:Width x1) e8:ea:6a:00:1b:2a
[  863.062194] igb 0000:08:00.0: eth0: PBA No: 000200-000
[  863.062196] igb 0000:08:00.0: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s)
[  863.064889] igb 0000:08:00.0 enp8s0: renamed from eth0

But disconnecting it is another story:

[ 1002.807932] igb 0000:08:00.0: removed PHC on enp8s0
[ 1002.807944] igb 0000:08:00.0 enp8s0: PCIe link lost, device now detached
[ 1003.341141] ------------[ cut here ]------------
[ 1003.341148] WARNING: CPU: 0 PID: 199 at lib/iomap.c:43 bad_io_access+0x38/0x40()
[ 1003.341149] Bad IO access at port 0x0 ()
[ 1003.342767] Modules linked in: snd_usb_audio snd_usbmidi_lib snd_rawmidi igb dca firewire_ohci firewire_core crc_itu_t rfcomm ctr ccm arc4 iwlmvm mac80211 fuse xt_CHECKSUM ipt_MASQUERADE
nf_nat_masquerade_ipv4 tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat
nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter bnep dm_mirror dm_region_hash dm_log dm_mod coretemp x86_pkg_temp_thermal intel_powerclamp kvm_intel snd_hda_codec_hdmi kvm
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel drbg
[ 1003.342793]  ansi_cprng aesni_intel hp_wmi aes_x86_64 iTCO_wdt lrw iTCO_vendor_support ppdev gf128mul sparse_keymap glue_helper ablk_helper cryptd snd_hda_codec_realtek snd_hda_codec_generic
microcode snd_hda_intel uvcvideo iwlwifi snd_hda_codec videobuf2_vmalloc videobuf2_memops snd_hda_core videobuf2_core snd_hwdep btusb v4l2_common btrtl snd_seq btbcm btintel videodev cfg80211
snd_seq_device rtsx_pci_ms bluetooth pcspkr input_leds i2c_i801 media parport_pc memstick rfkill sg lpc_ich snd_pcm 8250_fintek parport joydev snd_timer snd soundcore hp_accel ie31200_edac
mei_me lis3lv02d edac_core input_polldev mei hp_wireless shpchp tpm_infineon sch_fq_codel nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables autofs4 xfs libcrc32c sd_mod sr_mod cdrom
rtsx_pci_sdmmc mmc_core crc32c_intel serio_raw rtsx_pci
[ 1003.342822]  nouveau ahci libahci mxm_wmi e1000e xhci_pci hwmon ptp drm_kms_helper pps_core xhci_hcd ttm wmi video ipv6
[ 1003.342839] CPU: 0 PID: 199 Comm: kworker/0:2 Not tainted 4.2.0-2.el7_UNSUPPORTED.x86_64 #1
[ 1003.342840] Hardware name: Hewlett-Packard HP ZBook 15 G2/2253, BIOS M70 Ver. 01.07 02/26/2015
[ 1003.342843] Workqueue: pciehp-3 pciehp_power_thread
[ 1003.342844]  ffffffff81a90655 ffff8804866d3b48 ffffffff8164763a 0000000000000000
[ 1003.342846]  ffff8804866d3b98 ffff8804866d3b88 ffffffff8107134a ffff8804866d3b88
[ 1003.342847]  ffff880486f46000 ffff88046c8a8000 ffff880486f46840 ffff88046c8a8098
[ 1003.342848] Call Trace:
[ 1003.342852]  [<ffffffff8164763a>] dump_stack+0x45/0x57
[ 1003.342855]  [<ffffffff8107134a>] warn_slowpath_common+0x8a/0xc0
[ 1003.342857]  [<ffffffff810713c6>] warn_slowpath_fmt+0x46/0x50
[ 1003.342859]  [<ffffffff8133719e>] ? pci_disable_msix+0x3e/0x50
[ 1003.342860]  [<ffffffff812f6328>] bad_io_access+0x38/0x40
[ 1003.342861]  [<ffffffff812f6567>] pci_iounmap+0x27/0x40
[ 1003.342865]  [<ffffffffa0b728d7>] igb_remove+0xc7/0x160 [igb]
[ 1003.342867]  [<ffffffff8132189f>] pci_device_remove+0x3f/0xc0
[ 1003.342869]  [<ffffffff81433426>] __device_release_driver+0x96/0x130
[ 1003.342870]  [<ffffffff814334e3>] device_release_driver+0x23/0x30
[ 1003.342871]  [<ffffffff8131b404>] pci_stop_bus_device+0x94/0xa0
[ 1003.342872]  [<ffffffff8131b3ad>] pci_stop_bus_device+0x3d/0xa0
[ 1003.342873]  [<ffffffff8131b3ad>] pci_stop_bus_device+0x3d/0xa0
[ 1003.342874]  [<ffffffff8131b516>] pci_stop_and_remove_bus_device+0x16/0x30
[ 1003.342876]  [<ffffffff81333f5b>] pciehp_unconfigure_device+0x9b/0x180
[ 1003.342877]  [<ffffffff81333a73>] pciehp_disable_slot+0x43/0xb0
[ 1003.342878]  [<ffffffff81333b6d>] pciehp_power_thread+0x8d/0xb0
[ 1003.342885]  [<ffffffff810881b2>] process_one_work+0x152/0x3d0
[ 1003.342886]  [<ffffffff8108854a>] worker_thread+0x11a/0x460
[ 1003.342887]  [<ffffffff81088430>] ? process_one_work+0x3d0/0x3d0
[ 1003.342890]  [<ffffffff8108ddd9>] kthread+0xc9/0xe0
[ 1003.342891]  [<ffffffff8108dd10>] ? kthread_create_on_node+0x180/0x180
[ 1003.342893]  [<ffffffff8164e29f>] ret_from_fork+0x3f/0x70
[ 1003.342894]  [<ffffffff8108dd10>] ? kthread_create_on_node+0x180/0x180
[ 1003.342895] ---[ end trace 65a77e06d5aa9358 ]---

Upon looking at the igb driver, I see that igb_rd32() attempted to read from
hw_addr and failed, so it set hw->hw_addr to NULL and spit out the message
in the log output above, "PCIe link lost, device now detached".

Well, now that hw_addr is NULL, the attempt to call pci_iounmap is obviously
not going to go well. As suggested by Mark Rustad, do something similar to
what ixgbe does, and save a copy of hw_addr as adapter->io_addr, so we can
still call pci_iounmap on it on teardown. Additionally, for consistency,
make the pci_iomap call assignment directly to io_addr, so map and unmap
match.
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

e1000_clean_tx_irq cleans buffers and sets tx_ring->next_to_clean,
then e1000_xmit_frame reuses the cleaned buffers. But there are no
memory barriers when buffers gets recycled, so the recycled buffers
can be corrupted.

Use smp_store_release to update tx_ring->next_to_clean and
smp_load_acquire to read tx_ring->next_to_clean to properly
hand off buffers from e1000_clean_tx_irq to e1000_xmit_frame.

The data race was found with KernelThreadSanitizer (KTSAN).
Signed-off-by: NDmitry Vyukov <dvyukov@google.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>