Let us reuse the already defined has_csr check and not
redefine it.

The main difference is that in effect this will flip .has_csr to 1
(via GEN9_FEATURES which GEN11_FEATURES pulls in).
Suggested-by: NImre Deak <imre.deak@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NAnusha Srivatsa <anusha.srivatsa@intel.com>
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=107382Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1534527210-16841-1-git-send-email-anusha.srivatsa@intel.com
(cherry picked from commit da4468a1aa75457e6134127b19761b7ba62ce945)
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>

There is currently a warning when building the Kryo cpufreq driver into
the kernel image:

WARNING: vmlinux.o(.text+0x8aa424): Section mismatch in reference from
the function qcom_cpufreq_kryo_probe() to the function
.init.text:qcom_cpufreq_kryo_get_msm_id()
The function qcom_cpufreq_kryo_probe() references
the function __init qcom_cpufreq_kryo_get_msm_id().
This is often because qcom_cpufreq_kryo_probe lacks a __init
annotation or the annotation of qcom_cpufreq_kryo_get_msm_id is wrong.

Remove the '__init' annotation from qcom_cpufreq_kryo_get_msm_id
so that there is no more mismatch warning.

Additionally, Nick noticed that the remove function was marked as
'__init' when it should really be marked as '__exit'.

Fixes: 46e2856b (cpufreq: Add Kryo CPU scaling driver)
Fixes: 5ad7346b (cpufreq: kryo: Add module remove and exit)
Reported-by: NNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: NNathan Chancellor <natechancellor@gmail.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Cc: 4.18+ <stable@vger.kernel.org> # 4.18+
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

Commit a46b5367 ("xen/blkfront: cleanup
stale persistent grants") introduced a regression as purged persistent
grants were not pu into the list of free grants again. Correct that.
Reviewed-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: NJuergen Gross <jgross@suse.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

Fix didn't work for all cases, reverting to add a (hopefully)
better fix.

This reverts commit f151ba98.
Signed-off-by: NJens Axboe <axboe@kernel.dk>

After write SSD completed, bcache schedules journal_write work to
system_wq, which is a public workqueue in system, without WQ_MEM_RECLAIM
flag. system_wq is also a bound wq, and there may be no idle kworker on
current processor. Creating a new kworker may unfortunately need to
reclaim memory first, by shrinking cache and slab used by vfs, which
depends on bcache device. That's a deadlock.

This patch create a new workqueue for journal_write with WQ_MEM_RECLAIM
flag. It's rescuer thread will work to avoid the deadlock.
Signed-off-by: NGuoju Fang <fangguoju@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: NColy Li <colyli@suse.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

[Why]
EDID emulation didn't work properly for linux, as we stop programming
if nothing is connected physically.

[How]
We get a flag from DRM when we want to do edid emulation. We check if
this flag is true and nothing is connected physically, if so we only
program the front end using VIRTUAL_SIGNAL.
Signed-off-by: NBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: NHarry Wentland <Harry.Wentland@amd.com>
Acked-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

[Why]
There have been a few reports of Vega10 display remaining blank
after S3 resume. The regression is caused by workaround for mode
change on Vega10 - skip set_bandwidth if stream count is 0.
As a result we skipped dispclk reset on suspend, thus on resume
we may skip the clock update assuming it hasn't been changed.
On some systems it causes display blank or 'out of range'.

[How]
Revert "drm/amd/display: Fix Vega10 black screen after mode change"
Verified that it hadn't cause mode change regression.
Signed-off-by: NRoman Li <Roman.Li@amd.com>
Reviewed-by: NSun peng Li <Sunpeng.Li@amd.com>
Acked-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

The vce cancel_delayed_work_sync never be called.
driver call the function in error path.

This caused the A+A suspend hang when runtime pm enebled.
As we will visit the smu in the idle queue. this will cause
smu hang because the dgpu has been suspend, and the dgpu also
will be waked up. As the smu has been hang, so the dgpu resume
will failed.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NFeifei Xu <Feifei.Xu@amd.com>
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

This reverts commit 0c08754b.

commit 0c08754b
("drm/panel: Add device_link from panel device to DRM device")
creates a circular dependency under these circumstances:

1. The panel depends on dsi-host because it is MIPI-DSI child
   device.
2. dsi-host depends on the drm parent device (connector->dev->dev)
   this should be allowed.
3. drm parent dev (connector->dev->dev) depends on the panel
   after this patch.

This makes the dependency circular and while it appears it
does not affect any in-tree drivers (they do not seem to have
dsi hosts depending on the same parent device) this does not
seem right.

As noted in a response from Andrzej Hajda, the intent is
likely to make the panel dependent on the DRM device
(connector->dev) not its parent. But we have no way of
doing that since the DRM device doesn't contain any
struct device on its own (arguably it should).

Revert this until a proper approach is figured out.

Cc: Jyri Sarha <jsarha@ti.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927124130.9102-1-linus.walleij@linaro.org

Commit a46b5367 ("xen/blkfront: cleanup stale persistent grants")
added support for purging persistent grants when they are not in use. As
part of the purge, the grants were removed from the grant buffer, This
eventually causes the buffer to become empty, with BUG_ON triggered in
get_free_grant(). This can be observed even on an idle system, within
20-30 minutes.

We should keep the grants in the buffer when purging, and only free the
grant ref.

Fixes: a46b5367 ("xen/blkfront: cleanup stale persistent grants")
Reviewed-by: NJuergen Gross <jgross@suse.com>
Signed-off-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

The smatch utility reports a possible leak:

smatch warnings:
drivers/clocksource/timer-atmel-pit.c:183 at91sam926x_pit_dt_init() warn: possible memory leak of 'data'

Ensure data is freed before exiting with an error.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Cc: stable@vger.kernel.org
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

HP 6730b laptop has an ethernet NIC connected to one of the PCIe root
ports.  The root ports themselves are native PCIe hotplug capable.  Now,
during boot after PCI devices are scanned the BIOS triggers ACPI bus check
directly to the NIC:

  ACPI: \_SB_.PCI0.RP06.NIC_: Bus check in hotplug_event()

It is not clear why it is sending bus check but regardless the ACPI hotplug
notify handler calls enable_slot() directly (instead of going through
acpiphp_check_bridge() as there is no bridge), which ends up handling
special case for non-hotplug bridges with native PCIe hotplug.  This
results a crash of some kind but the reporter only sees black screen so it
is hard to figure out the exact spot and what actually happens.  Based on
a few fix proposals it was tracked to crash somewhere inside
pci_assign_unassigned_bridge_resources().

In any case we should not really be in that special branch at all because
the ACPI notify happened to a slot that is not a PCI bridge (it is just a
regular PCI device).

Fix this so that we only go to that special branch if we are calling
enable_slot() for a bridge (e.g., the ACPI notification was for the
bridge).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=201127
Fixes: 84c8b58e ("ACPI / hotplug / PCI: Don't scan bridges managed by native hotplug")
Reported-by: NPeter Anemone <peter.anemone@gmail.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org	# v4.18+

We attempt to get fences earlier in the hopes that everything will
already have fences and no callbacks will be needed.  If we do succeed
in getting a fence, getting one a second time will result in a duplicate
ref with no unref.  This is causing memory leaks in Vulkan applications
that create a lot of fences; playing for a few hours can, apparently,
bring down the system.

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107899Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NJason Ekstrand <jason@jlekstrand.net>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926071703.15257-1-jason.ekstrand@intel.com

ACPI HID devices do not actually have an alias for
them in the IVRS. But dev_data->alias is still used
for indexing into the IOMMU device table for devices
being handled by the IOMMU. So for ACPI HID devices,
we simply return the corresponding devid as an alias,
as parsed from IVRS table.
Signed-off-by: NArindam Nath <arindam.nath@amd.com>
Fixes: 2bf9a0a1 ('iommu/amd: Add iommu support for ACPI HID devices')
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

Signed-off-by: NSusobhan Dey <susobhan.dey@gmail.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Currently add_modify_gid() for IB link layer has followong issue
in cache update path.

When GID update event occurs, core releases reference to the GID
table without updating its state and/or entry pointer.

CPU-0                              CPU-1
------                             -----
ib_cache_update()                    IPoIB ULP
   add_modify_gid()                   [..]
      put_gid_entry()
      refcnt = 0, but
      state = valid,
      entry is valid.
      (work item is not yet executed).
                                   ipoib_create_ah()
                                     rdma_create_ah()
                                        rdma_get_gid_attr() <--
                                   	Tries to acquire gid_attr
                                        which has refcnt = 0.
                                   	This is incorrect.

GID entry state and entry pointer is provides the accurate GID enty
state. Such fields must be updated with rwlock to protect against
readers and, such fields must be in sane state before refcount can drop
to zero. Otherwise above race condition can happen leading to
use-after-free situation.

Following backtrace has been observed when cache update for an IB port
is triggered while IPoIB ULP is creating an AH.

Therefore, when updating GID entry, first mark a valid entry as invalid
through state and set the barrier so that no callers can acquired
the GID entry, followed by release reference to it.

refcount_t: increment on 0; use-after-free.
WARNING: CPU: 4 PID: 29106 at lib/refcount.c:153 refcount_inc_checked+0x30/0x50
Workqueue: ib-comp-unb-wq ib_cq_poll_work [ib_core]
RIP: 0010:refcount_inc_checked+0x30/0x50
RSP: 0018:ffff8802ad36f600 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffffffff86710100
RBP: ffff8802d6e60a30 R08: ffffed005d67bf8b R09: ffffed005d67bf8b
R10: 0000000000000001 R11: ffffed005d67bf8a R12: ffff88027620cee8
R13: ffff8802d6e60988 R14: ffff8802d6e60a78 R15: 0000000000000202
FS: 0000000000000000(0000) GS:ffff8802eb200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ab35e5c88 CR3: 00000002ce84a000 CR4: 00000000000006e0
IPv6: ADDRCONF(NETDEV_CHANGE): ib1: link becomes ready
Call Trace:
rdma_get_gid_attr+0x220/0x310 [ib_core]
? lock_acquire+0x145/0x3a0
rdma_fill_sgid_attr+0x32c/0x470 [ib_core]
rdma_create_ah+0x89/0x160 [ib_core]
? rdma_fill_sgid_attr+0x470/0x470 [ib_core]
? ipoib_create_ah+0x52/0x260 [ib_ipoib]
ipoib_create_ah+0xf5/0x260 [ib_ipoib]
ipoib_mcast_join_complete+0xbbe/0x2540 [ib_ipoib]

Fixes: b150c386 ("IB/core: Introduce GID entry reference counts")
Signed-off-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Upon DEVX object creation the object must be destroyed upon a follows
error flow.

Fixes: 7efce369 ("IB/mlx5: Add obj create and destroy functionality")
Signed-off-by: NYishai Hadas <yishaih@mellanox.com>
Reviewed-by: NArtemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Make sure we free struct uverbs_api once we clean the radix tree. It was
allocated by uverbs_alloc_api().

Fixes: 9ed3e5f4 ("IB/uverbs: Build the specs into a radix tree at runtime")
Reported-by: NBart Van Assche <bvanassche@acm.org>
Signed-off-by: NMark Bloch <markb@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

Pasid table memory allocation could return failure due to memory
shortage. Limit the pasid table size to 1MiB because current 8MiB
contiguous physical memory allocation can be hard to come by. W/o
a PASID table, the device could continue to work with only shared
virtual memory impacted. So, let's go ahead with context mapping
even the memory allocation for pasid table failed.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107783
Fixes: cc580e41 ("iommu/vt-d: Per PCI device pasid table interfaces")

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-and-tested-by: NPelton Kyle D <kyle.d.pelton@intel.com>
Tested-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

This reverts commit 55aedef5.

Commit 55aedef5 ("pinctrl: intel: Do pin translation when lock IRQ")
added special translation from GPIO number to hardware pin number to
irq_reqres/relres hooks to avoid failure when IRQs are requested. The
actual failure happened inside gpiochip_lock_as_irq() because it calls
gpiod_get_direction() and pinctrl-intel.c::intel_gpio_get_direction()
implementation originally missed the translation so the two hooks made
it work by skipping the ->get_direction() call entirely (it overwrote
the default GPIOLIB provided functions).

The proper fix that adds translation to GPIO callbacks was merged with
commit 96147db1 ("pinctrl: intel: Do pin translation in other GPIO
operations as well"). This allows us to use the default GPIOLIB provided
functions again.

In addition as find out by Benjamin Tissoires the two functions
(intel_gpio_irq_reqres()/intel_gpio_irq_relres()) now cause problems of
their own because they operate on pin numbers and pass that pin number
to gpiochip_lock_as_irq() which actually expects a GPIO number.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199911
Fixes: 55aedef5 ("pinctrl: intel: Do pin translation when lock IRQ")
Reported-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

It turns out the HOSTSW_OWN register offset is different between LP and
H variants. The latter should use 0xc0 instead so fix that.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199911
Fixes: a663ccf0 ("pinctrl: intel: Add Intel Cannon Lake PCH-H pin controller support")
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

From the AMD BKDG, if WAKE_INT_MASTER_REG.MaskStsEn is set, a software
write to the debounce registers of *any* gpio will block wake/interrupt
status generation for *all* gpios for a length of time that depends on
WAKE_INT_MASTER_REG.MaskStsLength[11:0].  During this period the Interrupt
Delivery bit (INTERRUPT_ENABLE) will read as 0.

In commit 4c1de041 ("pinctrl/amd: poll InterruptEnable bits in
enable_irq") we tried to fix this same "gpio Interrupts are blocked
immediately after writing debounce registers" problem, but incorrectly
assumed it only affected the gpio whose debounce was being configured
and not ALL gpios.

To solve this for all gpios, we move the polling loop from
amd_gpio_irq_enable() to amd_gpio_irq_set_type(), while holding the gpio
spinlock.  This ensures that another gpio operation (e.g.
amd_gpio_irq_unmask()) can read a temporarily disabled IRQ and
incorrectly disable it while trying to modify some other register bits.

Fixes: 4c1de041 pinctrl/amd: poll InterruptEnable bits in enable_irq
Signed-off-by: NDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

In the iommu's shutdown handler we disable runtime-pm which could
result in the irq-handler running unclocked and since commit
    3fc7c5c0 ("iommu/rockchip: Handle errors returned from PM framework")
we warn about that fact.

This can cause warnings on shutdown on some Rockchip machines, so
free the irqs in the shutdown handler before we disable runtime-pm.
Reported-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Fixes: 3fc7c5c0 ("iommu/rockchip: Handle errors returned from PM framework")
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Tested-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

With CONFIG_DMA_API_DEBUG enabled we get DMA unmapping warning in
various places of the mvneta driver, for example when putting down an
interface while traffic is passing through.

The issue is when using s/w buffer management, the Rx buffers are mapped
using dma_map_page but unmapped with dma_unmap_single. This patch fixes
this by using the right unmapping function.

Fixes: 562e2f46 ("net: mvneta: Improve the buffer allocation method for SWBM")
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

bnxt_re_ib_reg acquires and releases the rtnl lock whenever it accesses
the L2 driver.

The following sequence can trigger a crash

Acquires the rtnl_lock ->
	Registers roce driver callback with L2 driver ->
		release the rtnl lock
bnxt_re acquires the rtnl_lock ->
	Request for MSIx vectors ->
		release the rtnl_lock

Issue happens when bnxt_re proceeds with remaining part of initialization
and L2 driver invokes bnxt_ulp_irq_stop as a part of bnxt_open_nic.

The crash is in bnxt_qplib_nq_stop_irq as the NQ structures are
not initialized yet,

<snip>
[ 3551.726647] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 3551.726656] IP: [<ffffffffc0840ee9>] bnxt_qplib_nq_stop_irq+0x59/0xb0 [bnxt_re]
[ 3551.726674] PGD 0
[ 3551.726679] Oops: 0002 1 SMP
...
[ 3551.726822] Hardware name: Dell Inc. PowerEdge R720/08RW36, BIOS 2.4.3 07/09/2014
[ 3551.726826] task: ffff97e30eec5ee0 ti: ffff97e3173bc000 task.ti: ffff97e3173bc000
[ 3551.726829] RIP: 0010:[<ffffffffc0840ee9>] [<ffffffffc0840ee9>]
bnxt_qplib_nq_stop_irq+0x59/0xb0 [bnxt_re]
...
[ 3551.726872] Call Trace:
[ 3551.726886] [<ffffffffc082cb9e>] bnxt_re_stop_irq+0x4e/0x70 [bnxt_re]
[ 3551.726899] [<ffffffffc07d6a53>] bnxt_ulp_irq_stop+0x43/0x70 [bnxt_en]
[ 3551.726908] [<ffffffffc07c82f4>] bnxt_reserve_rings+0x174/0x1e0 [bnxt_en]
[ 3551.726917] [<ffffffffc07cafd8>] __bnxt_open_nic+0x368/0x9a0 [bnxt_en]
[ 3551.726925] [<ffffffffc07cb62b>] bnxt_open_nic+0x1b/0x50 [bnxt_en]
[ 3551.726934] [<ffffffffc07cc62f>] bnxt_setup_mq_tc+0x11f/0x260 [bnxt_en]
[ 3551.726943] [<ffffffffc07d5f58>] bnxt_dcbnl_ieee_setets+0xb8/0x1f0 [bnxt_en]
[ 3551.726954] [<ffffffff890f983a>] dcbnl_ieee_set+0x9a/0x250
[ 3551.726966] [<ffffffff88fd6d21>] ? __alloc_skb+0xa1/0x2d0
[ 3551.726972] [<ffffffff890f72fa>] dcb_doit+0x13a/0x210
[ 3551.726981] [<ffffffff89003ff7>] rtnetlink_rcv_msg+0xa7/0x260
[ 3551.726989] [<ffffffff88ffdb00>] ? rtnl_unicast+0x20/0x30
[ 3551.726996] [<ffffffff88bf9dc8>] ? __kmalloc_node_track_caller+0x58/0x290
[ 3551.727002] [<ffffffff890f7326>] ? dcb_doit+0x166/0x210
[ 3551.727007] [<ffffffff88fd6d0d>] ? __alloc_skb+0x8d/0x2d0
[ 3551.727012] [<ffffffff89003f50>] ? rtnl_newlink+0x880/0x880
...
[ 3551.727104] [<ffffffff8911f7d5>] system_call_fastpath+0x1c/0x21
...
[ 3551.727164] RIP [<ffffffffc0840ee9>] bnxt_qplib_nq_stop_irq+0x59/0xb0 [bnxt_re]
[ 3551.727175] RSP <ffff97e3173bf788>
[ 3551.727177] CR2: 0000000000000000

Avoid this inconsistent state and  system crash by acquiring
the rtnl lock for the entire duration of device initialization.
Re-factor the code to remove the rtnl lock from the individual function
and acquire and release it from the caller.

Fixes: 1ac5a404 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Fixes: 6e04b103 ("RDMA/bnxt_re: Fix broken RoCE driver due to recent L2 driver changes")
Signed-off-by: NSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

This patch fixes skb_shared area, which will be corrupted
upon reception of 4K jumbo packets.

Originally build_skb usage purpose was to reuse page for skb to eliminate
needs of extra fragments. But that logic does not take into account that
skb_shared_info should be reserved at the end of skb data area.

In case packet data consumes all the page (4K), skb_shinfo location
overflows the page. As a consequence, __build_skb zeroed shinfo data above
the allocated page, corrupting next page.

The issue is rarely seen in real life because jumbo are normally larger
than 4K and that causes another code path to trigger.
But it 100% reproducible with simple scapy packet, like:

    sendp(IP(dst="192.168.100.3") / TCP(dport=443) \
          / Raw(RandString(size=(4096-40))), iface="enp1s0")

Fixes: 018423e9 ("net: ethernet: aquantia: Add ring support code")
Reported-by: NFriedemann Gerold <f.gerold@b-c-s.de>
Reported-by: NMichael Rauch <michael@rauch.be>
Signed-off-by: NFriedemann Gerold <f.gerold@b-c-s.de>
Tested-by: NNikita Danilov <nikita.danilov@aquantia.com>
Signed-off-by: NIgor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

tun uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

nfp uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Tested-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

bnxt uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

bnx2x uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

mlx5 uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

mlx4 uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

i40evf uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ice uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

igb uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgb uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

This also removes a problematic use of disable_irq() in
a context it is forbidden, as explained in commit
af3e0fcf ("8139too: Use disable_irq_nosync() in
rtl8139_poll_controller()")
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
lasts for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

fm10k uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgbevf uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgbe uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.
Reported-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Tested-by: NSong Liu <songliubraving@fb.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We want to allow NAPI drivers to no longer provide
ndo_poll_controller() method, as it has been proven problematic.

team driver must not look at its presence, but instead call
netpoll_poll_dev() which factorize the needed actions.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Acked-by: NJay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>