commit 754e449889 upstream.
According to PCI 3.0 specification, sending both MSI and MSI-X interrupts
is done by DWORD memory write operation to doorbell message address. The
write operation for MSI has zero upper 16 bits and the MSI interrupt number
in the lower 16 bits, while the write operation for MSI-X contains a 32-bit
value from MSI-X table.
Since the driver only uses interrupt numbers from range 0..31, the upper
16 bits of the DWORD memory write operation to doorbell message address
are zero even for MSI-X interrupts. Thus we can enable MSI-X interrupts.
Testing proves that kernel can correctly receive MSI-X interrupts from PCIe
cards which supports both MSI and MSI-X interrupts.
Link: https://lore.kernel.org/r/20220110015018.26359-13-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 46ad3dc417 upstream.
MSI address for receiving MSI interrupts needs to be correctly set before
enabling processing of MSI interrupts.
Move code for setting PCIE_MSI_ADDR_LOW_REG and PCIE_MSI_ADDR_HIGH_REG
from advk_pcie_init_msi_irq_domain() to advk_pcie_setup_hw(), before
enabling PCIE_CORE_CTRL2_MSI_ENABLE.
After this we can remove the now unused member msi_msg, which was used
only for MSI doorbell address. MSI address can be any address which cannot
be used to DMA to. So change it to the address of the main struct advk_pcie.
Link: https://lore.kernel.org/r/20220110015018.26359-12-kabel@kernel.org
Fixes: 8c39d71036 ("PCI: aardvark: Add Aardvark PCI host controller driver")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org # f21a8b1b68 ("PCI: aardvark: Move to MSI handling using generic MSI support")
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1571d67dc1 upstream.
Rewrite the code to use irq_set_chained_handler_and_data() handler with
chained_irq_enter() and chained_irq_exit() processing instead of using
devm_request_irq().
advk_pcie_irq_handler() reads IRQ status bits and calls other functions
based on which bits are set. These functions then read its own IRQ status
bits and calls other aardvark functions based on these bits. Finally
generic_handle_domain_irq() with translated linux IRQ numbers are called.
Link: https://lore.kernel.org/r/20220110015018.26359-5-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 9319230ac1 upstream.
The current assignment to the class_revision member
class_revision |= cpu_to_le32(PCI_CLASS_BRIDGE_PCI << 16);
can make the reader think that class is at high 16 bits of the member and
revision at low 16 bits.
In reality, class is at high 24 bits, but the class for PCI Bridge Normal
Decode is PCI_CLASS_BRIDGE_PCI << 8.
Change the assignment and add a comment to make this clearer.
Link: https://lore.kernel.org/r/20211130172913.9727-2-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 4a2a664ed8 ]
Referenced change added check to skip updating fib when new fib instance
has same or lower priority. However, new fib instance can be an update on
same dst address as existing one even though the structure is another
instance that has different address. Ignoring events on such instances
causes multipath LAG state to not be correctly updated.
Track 'dst' and 'dst_len' fields of fib event fib_entry_notifier_info
structure and don't skip events that have the same value of that fields.
Fixes: ad11c4f1d8 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit a6589155ec ]
Referenced change incorrectly sets single path fib_info even when LAG is
not active. Fix it by moving call to mlx5_lag_fib_set() into conditional
that verifies LAG state.
Fixes: ad11c4f1d8 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 27b0420fd9 ]
Recent commit that modified fib route event handler to handle events
according to their priority introduced use-after-free[0] in mp->mfi pointer
usage. The pointer now is not just cached in order to be compared to
following fib_info instances, but is also dereferenced to obtain
fib_priority. However, since mlx5 lag code doesn't hold the reference to
fin_info during whole mp->mfi lifetime, it could be used after fib_info
instance has already been freed be kernel infrastructure code.
Don't ever dereference mp->mfi pointer. Refactor it to be 'const void*'
type and cache fib_info priority in dedicated integer. Group
fib_info-related data into dedicated 'fib' structure that will be further
extended by following patches in the series.
[0]:
[ 203.588029] ==================================================================
[ 203.590161] BUG: KASAN: use-after-free in mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.592386] Read of size 4 at addr ffff888144df2050 by task kworker/u20:4/138
[ 203.594766] CPU: 3 PID: 138 Comm: kworker/u20:4 Tainted: G B 5.17.0-rc7+ #6
[ 203.596751] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[ 203.598813] Workqueue: mlx5_lag_mp mlx5_lag_fib_update [mlx5_core]
[ 203.600053] Call Trace:
[ 203.600608] <TASK>
[ 203.601110] dump_stack_lvl+0x48/0x5e
[ 203.601860] print_address_description.constprop.0+0x1f/0x160
[ 203.602950] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.604073] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.605177] kasan_report.cold+0x83/0xdf
[ 203.605969] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.607102] mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.608199] ? mlx5_lag_init_fib_work+0x1c0/0x1c0 [mlx5_core]
[ 203.609382] ? read_word_at_a_time+0xe/0x20
[ 203.610463] ? strscpy+0xa0/0x2a0
[ 203.611463] process_one_work+0x722/0x1270
[ 203.612344] worker_thread+0x540/0x11e0
[ 203.613136] ? rescuer_thread+0xd50/0xd50
[ 203.613949] kthread+0x26e/0x300
[ 203.614627] ? kthread_complete_and_exit+0x20/0x20
[ 203.615542] ret_from_fork+0x1f/0x30
[ 203.616273] </TASK>
[ 203.617174] Allocated by task 3746:
[ 203.617874] kasan_save_stack+0x1e/0x40
[ 203.618644] __kasan_kmalloc+0x81/0xa0
[ 203.619394] fib_create_info+0xb41/0x3c50
[ 203.620213] fib_table_insert+0x190/0x1ff0
[ 203.621020] fib_magic.isra.0+0x246/0x2e0
[ 203.621803] fib_add_ifaddr+0x19f/0x670
[ 203.622563] fib_inetaddr_event+0x13f/0x270
[ 203.623377] blocking_notifier_call_chain+0xd4/0x130
[ 203.624355] __inet_insert_ifa+0x641/0xb20
[ 203.625185] inet_rtm_newaddr+0xc3d/0x16a0
[ 203.626009] rtnetlink_rcv_msg+0x309/0x880
[ 203.626826] netlink_rcv_skb+0x11d/0x340
[ 203.627626] netlink_unicast+0x4cc/0x790
[ 203.628430] netlink_sendmsg+0x762/0xc00
[ 203.629230] sock_sendmsg+0xb2/0xe0
[ 203.629955] ____sys_sendmsg+0x58a/0x770
[ 203.630756] ___sys_sendmsg+0xd8/0x160
[ 203.631523] __sys_sendmsg+0xb7/0x140
[ 203.632294] do_syscall_64+0x35/0x80
[ 203.633045] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 203.634427] Freed by task 0:
[ 203.635063] kasan_save_stack+0x1e/0x40
[ 203.635844] kasan_set_track+0x21/0x30
[ 203.636618] kasan_set_free_info+0x20/0x30
[ 203.637450] __kasan_slab_free+0xfc/0x140
[ 203.638271] kfree+0x94/0x3b0
[ 203.638903] rcu_core+0x5e4/0x1990
[ 203.639640] __do_softirq+0x1ba/0x5d3
[ 203.640828] Last potentially related work creation:
[ 203.641785] kasan_save_stack+0x1e/0x40
[ 203.642571] __kasan_record_aux_stack+0x9f/0xb0
[ 203.643478] call_rcu+0x88/0x9c0
[ 203.644178] fib_release_info+0x539/0x750
[ 203.644997] fib_table_delete+0x659/0xb80
[ 203.645809] fib_magic.isra.0+0x1a3/0x2e0
[ 203.646617] fib_del_ifaddr+0x93f/0x1300
[ 203.647415] fib_inetaddr_event+0x9f/0x270
[ 203.648251] blocking_notifier_call_chain+0xd4/0x130
[ 203.649225] __inet_del_ifa+0x474/0xc10
[ 203.650016] devinet_ioctl+0x781/0x17f0
[ 203.650788] inet_ioctl+0x1ad/0x290
[ 203.651533] sock_do_ioctl+0xce/0x1c0
[ 203.652315] sock_ioctl+0x27b/0x4f0
[ 203.653058] __x64_sys_ioctl+0x124/0x190
[ 203.653850] do_syscall_64+0x35/0x80
[ 203.654608] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 203.666952] The buggy address belongs to the object at ffff888144df2000
which belongs to the cache kmalloc-256 of size 256
[ 203.669250] The buggy address is located 80 bytes inside of
256-byte region [ffff888144df2000, ffff888144df2100)
[ 203.671332] The buggy address belongs to the page:
[ 203.672273] page:00000000bf6c9314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144df0
[ 203.674009] head:00000000bf6c9314 order:2 compound_mapcount:0 compound_pincount:0
[ 203.675422] flags: 0x2ffff800010200(slab|head|node=0|zone=2|lastcpupid=0x1ffff)
[ 203.676819] raw: 002ffff800010200 0000000000000000 dead000000000122 ffff888100042b40
[ 203.678384] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
[ 203.679928] page dumped because: kasan: bad access detected
[ 203.681455] Memory state around the buggy address:
[ 203.682421] ffff888144df1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.683863] ffff888144df1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.685310] >ffff888144df2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 203.686701] ^
[ 203.687820] ffff888144df2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 203.689226] ffff888144df2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.690620] ==================================================================
Fixes: ad11c4f1d8 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 7ba2d9d8de ]
Resource dump menu may span over more than a single page, support it.
Otherwise, menu read may result in a memory access violation: reading
outside of the allocated page.
Note that page format of the first menu page contains menu headers while
the proceeding menu pages contain only records.
The KASAN logs are as follows:
BUG: KASAN: slab-out-of-bounds in strcmp+0x9b/0xb0
Read of size 1 at addr ffff88812b2e1fd0 by task systemd-udevd/496
CPU: 5 PID: 496 Comm: systemd-udevd Tainted: G B 5.16.0_for_upstream_debug_2022_01_10_23_12 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x57/0x7d
print_address_description.constprop.0+0x1f/0x140
? strcmp+0x9b/0xb0
? strcmp+0x9b/0xb0
kasan_report.cold+0x83/0xdf
? strcmp+0x9b/0xb0
strcmp+0x9b/0xb0
mlx5_rsc_dump_init+0x4ab/0x780 [mlx5_core]
? mlx5_rsc_dump_destroy+0x80/0x80 [mlx5_core]
? lockdep_hardirqs_on_prepare+0x286/0x400
? raw_spin_unlock_irqrestore+0x47/0x50
? aomic_notifier_chain_register+0x32/0x40
mlx5_load+0x104/0x2e0 [mlx5_core]
mlx5_init_one+0x41b/0x610 [mlx5_core]
....
The buggy address belongs to the object at ffff88812b2e0000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 4048 bytes to the right of
4096-byte region [ffff88812b2e0000, ffff88812b2e1000)
The buggy address belongs to the page:
page:000000009d69807a refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812b2e6000 pfn:0x12b2e0
head:000000009d69807a order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8000000000010200(slab|head|zone=2)
raw: 8000000000010200 0000000000000000 dead000000000001 ffff888100043040
raw: ffff88812b2e6000 0000000080040000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88812b2e1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88812b2e1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88812b2e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88812b2e2000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88812b2e2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Fixes: 12206b1723 ("net/mlx5: Add support for resource dump")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit aafa025c76 ]
A reference to the framebuffer device struct fb_info is stored in the file
private data, but this reference could no longer be valid and must not be
accessed directly. Instead, the file_fb_info() accessor function must be
used since it does sanity checking to make sure that the fb_info is valid.
This can happen for example if the registered framebuffer device is for a
driver that just uses a framebuffer provided by the system firmware. In
that case, the fbdev core would unregister the framebuffer device when a
real video driver is probed and ask to remove conflicting framebuffers.
The bug has been present for a long time but commit 27599aacba ("fbdev:
Hot-unplug firmware fb devices on forced removal") unmasked it since the
fbdev core started unregistering the framebuffers' devices associated.
Fixes: 27599aacba ("fbdev: Hot-unplug firmware fb devices on forced removal")
Reported-by: Maxime Ripard <maxime@cerno.tech>
Reported-by: Junxiao Chang <junxiao.chang@intel.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220502135014.377945-1-javierm@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 887f75cfd0 upstream.
DP/HDMI audio on AMD PRO VII stops working after S3:
[ 149.450391] amdgpu 0000:63:00.0: amdgpu: MODE1 reset
[ 149.450395] amdgpu 0000:63:00.0: amdgpu: GPU mode1 reset
[ 149.450494] amdgpu 0000:63:00.0: amdgpu: GPU psp mode1 reset
[ 149.983693] snd_hda_intel 0000:63:00.1: refused to change power state from D0 to D3hot
[ 150.003439] amdgpu 0000:63:00.0: refused to change power state from D0 to D3hot
...
[ 155.432975] snd_hda_intel 0000:63:00.1: CORB reset timeout#2, CORBRP = 65535
The offending commit is daf8de0874 ("drm/amdgpu: always reset the asic in
suspend (v2)"). Commit 34452ac303 ("drm/amdgpu: don't use BACO for
reset in S3 ") doesn't help, so the issue is something different.
Assuming that to make HDA resume to D0 fully realized, it needs to be
successfully put to D3 first. And this guesswork proves working, by
moving amdgpu_asic_reset() to noirq callback, so it's called after HDA
function is in D3.
Fixes: daf8de0874 ("drm/amdgpu: always reset the asic in suspend (v2)")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Cc: "Limonciello, Mario" <Mario.Limonciello@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5ef9b803a4 upstream.
The AlphaProject AP-SH4A-3A/AP-SH4AD-0A SH boards use IRQ0 for their SMSC
LAN911x Ethernet chip, so the networking on them must have been broken by
commit 965b2aa78f ("net/smsc911x: fix irq resource allocation failure")
which filtered out 0 as well as the negative error codes -- it was kinda
correct at the time, as platform_get_irq() could return 0 on of_irq_get()
failure and on the actual 0 in an IRQ resource. This issue was fixed by
me (back in 2016!), so we should be able to fix this driver to allow IRQ0
usage again...
When merging this to the stable kernels, make sure you also merge commit
e330b9a6bb ("platform: don't return 0 from platform_get_irq[_byname]()
on error") -- that's my fix to platform_get_irq() for the DT platforms...
Fixes: 965b2aa78f ("net/smsc911x: fix irq resource allocation failure")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/656036e4-6387-38df-b8a7-6ba683b16e63@omp.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 195af57914 upstream.
In bnxt_poll_p5(), we first check cpr->has_more_work. If it is true,
we are in NAPI polling mode and we will call __bnxt_poll_cqs() to
continue polling. It is possible to exhanust the budget again when
__bnxt_poll_cqs() returns.
We then enter the main while loop to check for new entries in the NQ.
If we had previously exhausted the NAPI budget, we may call
__bnxt_poll_work() to process an RX entry with zero budget. This will
cause packets to be dropped unnecessarily, thinking that we are in the
netpoll path. Fix it by breaking out of the while loop if we need
to process an RX NQ entry with no budget left. We will then exit
NAPI and stay in polling mode.
Fixes: 389a877a3b ("bnxt_en: Process the NQ under NAPI continuous polling.")
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 13ba794397 upstream.
bnxt_open() can fail in this code path, especially on a VF when
it fails to reserve default rings:
bnxt_open()
__bnxt_open_nic()
bnxt_clear_int_mode()
bnxt_init_dflt_ring_mode()
RX rings would be set to 0 when we hit this error path.
It is possible for a subsequent bnxt_open() call to potentially succeed
with a code path like this:
bnxt_open()
bnxt_hwrm_if_change()
bnxt_fw_init_one()
bnxt_fw_init_one_p3()
bnxt_set_dflt_rfs()
bnxt_rfs_capable()
bnxt_hwrm_reserve_rings()
On older chips, RFS is capable if we can reserve the number of vnics that
is equal to RX rings + 1. But since RX rings is still set to 0 in this
code path, we may mistakenly think that RFS is supported for 0 RX rings.
Later, when the default RX rings are reserved and we try to enable
RFS, it would fail and cause bnxt_open() to fail unnecessarily.
We fix this in 2 places. bnxt_rfs_capable() will always return false if
RX rings is not yet set. bnxt_init_dflt_ring_mode() will call
bnxt_set_dflt_rfs() which will always clear the RFS flags if RFS is not
supported.
Fixes: 20d7d1c5c9 ("bnxt_en: reliably allocate IRQ table on reset to avoid crash")
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 3f65b1e2f4 upstream.
Current DP driver implementation has adding safe mode done at
dp_hpd_plug_handle() which is expected to be executed under event
thread context.
However there is possible circular locking happen (see blow stack trace)
after edp driver call dp_hpd_plug_handle() from dp_bridge_enable() which
is executed under drm_thread context.
After review all possibilities methods and as discussed on
https://patchwork.freedesktop.org/patch/483155/, supporting EDID
compliance tests in the driver is quite hacky. As seen with other
vendor drivers, supporting these will be much easier with IGT. Hence
removing all the related fail safe code for it so that no possibility
of circular lock will happen.
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
======================================================
WARNING: possible circular locking dependency detected
5.15.35-lockdep #6 Tainted: G W
------------------------------------------------------
frecon/429 is trying to acquire lock:
ffffff808dc3c4e8 (&dev->mode_config.mutex){+.+.}-{3:3}, at:
dp_panel_add_fail_safe_mode+0x4c/0xa0
but task is already holding lock:
ffffff808dc441e0 (&kms->commit_lock[i]){+.+.}-{3:3}, at: lock_crtcs+0xb4/0x124
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&kms->commit_lock[i]){+.+.}-{3:3}:
__mutex_lock_common+0x174/0x1a64
mutex_lock_nested+0x98/0xac
lock_crtcs+0xb4/0x124
msm_atomic_commit_tail+0x330/0x748
commit_tail+0x19c/0x278
drm_atomic_helper_commit+0x1dc/0x1f0
drm_atomic_commit+0xc0/0xd8
drm_atomic_helper_set_config+0xb4/0x134
drm_mode_setcrtc+0x688/0x1248
drm_ioctl_kernel+0x1e4/0x338
drm_ioctl+0x3a4/0x684
__arm64_sys_ioctl+0x118/0x154
invoke_syscall+0x78/0x224
el0_svc_common+0x178/0x200
do_el0_svc+0x94/0x13c
el0_svc+0x5c/0xec
el0t_64_sync_handler+0x78/0x108
el0t_64_sync+0x1a4/0x1a8
-> #2 (crtc_ww_class_mutex){+.+.}-{3:3}:
__mutex_lock_common+0x174/0x1a64
ww_mutex_lock+0xb8/0x278
modeset_lock+0x304/0x4ac
drm_modeset_lock+0x4c/0x7c
drmm_mode_config_init+0x4a8/0xc50
msm_drm_init+0x274/0xac0
msm_drm_bind+0x20/0x2c
try_to_bring_up_master+0x3dc/0x470
__component_add+0x18c/0x3c0
component_add+0x1c/0x28
dp_display_probe+0x954/0xa98
platform_probe+0x124/0x15c
really_probe+0x1b0/0x5f8
__driver_probe_device+0x174/0x20c
driver_probe_device+0x70/0x134
__device_attach_driver+0x130/0x1d0
bus_for_each_drv+0xfc/0x14c
__device_attach+0x1bc/0x2bc
device_initial_probe+0x1c/0x28
bus_probe_device+0x94/0x178
deferred_probe_work_func+0x1a4/0x1f0
process_one_work+0x5d4/0x9dc
worker_thread+0x898/0xccc
kthread+0x2d4/0x3d4
ret_from_fork+0x10/0x20
-> #1 (crtc_ww_class_acquire){+.+.}-{0:0}:
ww_acquire_init+0x1c4/0x2c8
drm_modeset_acquire_init+0x44/0xc8
drm_helper_probe_single_connector_modes+0xb0/0x12dc
drm_mode_getconnector+0x5dc/0xfe8
drm_ioctl_kernel+0x1e4/0x338
drm_ioctl+0x3a4/0x684
__arm64_sys_ioctl+0x118/0x154
invoke_syscall+0x78/0x224
el0_svc_common+0x178/0x200
do_el0_svc+0x94/0x13c
el0_svc+0x5c/0xec
el0t_64_sync_handler+0x78/0x108
el0t_64_sync+0x1a4/0x1a8
-> #0 (&dev->mode_config.mutex){+.+.}-{3:3}:
__lock_acquire+0x2650/0x672c
lock_acquire+0x1b4/0x4ac
__mutex_lock_common+0x174/0x1a64
mutex_lock_nested+0x98/0xac
dp_panel_add_fail_safe_mode+0x4c/0xa0
dp_hpd_plug_handle+0x1f0/0x280
dp_bridge_enable+0x94/0x2b8
drm_atomic_bridge_chain_enable+0x11c/0x168
drm_atomic_helper_commit_modeset_enables+0x500/0x740
msm_atomic_commit_tail+0x3e4/0x748
commit_tail+0x19c/0x278
drm_atomic_helper_commit+0x1dc/0x1f0
drm_atomic_commit+0xc0/0xd8
drm_atomic_helper_set_config+0xb4/0x134
drm_mode_setcrtc+0x688/0x1248
drm_ioctl_kernel+0x1e4/0x338
drm_ioctl+0x3a4/0x684
__arm64_sys_ioctl+0x118/0x154
invoke_syscall+0x78/0x224
el0_svc_common+0x178/0x200
do_el0_svc+0x94/0x13c
el0_svc+0x5c/0xec
el0t_64_sync_handler+0x78/0x108
el0t_64_sync+0x1a4/0x1a8
Changes in v2:
-- re text commit title
-- remove all fail safe mode
Changes in v3:
-- remove dp_panel_add_fail_safe_mode() from dp_panel.h
-- add Fixes
Changes in v5:
-- to=dianders@chromium.org
Changes in v6:
-- fix Fixes commit ID
Fixes: 8b2c181e3d ("drm/msm/dp: add fail safe mode outside of event_mutex context")
Reported-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Link: https://lore.kernel.org/r/1651007534-31842-1-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7a6bc33ab5 upstream.
check the return value of of_address_to_resource() and also add
missing of_node_put() for np and npp nodes.
Fixes: e0a3bc6544 ("net: emaclite: Support multiple phys connected to one MDIO bus")
Addresses-Coverity: Event check_return value.
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 95098d5ac2 upstream.
'tmp_node' need be put before returning from cpsw_probe_dt(),
so add missing of_node_put() in error path.
Fixes: ed3525eda4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2df6d89590 upstream.
QP destroy is synchronous and waits for its refcnt to be decremented in
irdma_cm_node_free_cb (for iWARP) which fires after the RCU grace period
elapses.
Applications running a large number of connections are exposed to high
wait times on destroy QP for events like SIGABORT.
The long pole for this wait time is the firing of the call_rcu callback
during a CM node destroy which can be slow. It holds the QP reference
count and blocks the destroy QP from completing.
call_rcu only needs to make sure that list walkers have a reference to the
cm_node object before freeing it and thus need to wait for grace period
elapse. The rest of the connection teardown in irdma_cm_node_free_cb is
moved out of the grace period wait in irdma_destroy_connection. Also,
replace call_rcu with a simple kfree_rcu as it just needs to do a kfree on
the cm_node
Fixes: 146b9756f1 ("RDMA/irdma: Add connection manager")
Link: https://lore.kernel.org/r/20220425181703.1634-3-shiraz.saleem@intel.com
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7b8943b821 upstream.
When connection establishment fails in iWARP mode, an app can drain the
QPs and hang because flush isn't issued when the QP is modified from RTR
state to error. Issue a flush in this case using function
irdma_cm_disconn().
Update irdma_cm_disconn() to do flush when cm_id is NULL, which is the
case when the QP is in RTR state and there is an error in the connection
establishment.
Fixes: b48c24c2d7 ("RDMA/irdma: Implement device supported verb APIs")
Link: https://lore.kernel.org/r/20220425181703.1634-2-shiraz.saleem@intel.com
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit ef91271c65 upstream.
The calling of siw_cm_upcall and detaching new_cep with its listen_cep
should be atomistic semantics. Otherwise siw_reject may be called in a
temporary state, e,g, siw_cm_upcall is called but the new_cep->listen_cep
has not being cleared.
This fixes a WARN:
WARNING: CPU: 7 PID: 201 at drivers/infiniband/sw/siw/siw_cm.c:255 siw_cep_put+0x125/0x130 [siw]
CPU: 2 PID: 201 Comm: kworker/u16:22 Kdump: loaded Tainted: G E 5.17.0-rc7 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Workqueue: iw_cm_wq cm_work_handler [iw_cm]
RIP: 0010:siw_cep_put+0x125/0x130 [siw]
Call Trace:
<TASK>
siw_reject+0xac/0x180 [siw]
iw_cm_reject+0x68/0xc0 [iw_cm]
cm_work_handler+0x59d/0xe20 [iw_cm]
process_one_work+0x1e2/0x3b0
worker_thread+0x50/0x3a0
? rescuer_thread+0x390/0x390
kthread+0xe5/0x110
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x1f/0x30
</TASK>
Fixes: 6c52fdc244 ("rdma/siw: connection management")
Link: https://lore.kernel.org/r/d528d83466c44687f3872eadcb8c184528b2e2d4.1650526554.git.chengyou@linux.alibaba.com
Reported-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit cb7786a76e upstream.
The sync reset flow can lead to the following deadlock when
poll_sync_reset() is called by timer softirq and waiting on
del_timer_sync() for the same timer. Fix that by moving the part of the
flow that waits for the timer to reset_reload_work.
It fixes the following kernel Trace:
RIP: 0010:del_timer_sync+0x32/0x40
...
Call Trace:
<IRQ>
mlx5_sync_reset_clear_reset_requested+0x26/0x50 [mlx5_core]
poll_sync_reset.cold+0x36/0x52 [mlx5_core]
call_timer_fn+0x32/0x130
__run_timers.part.0+0x180/0x280
? tick_sched_handle+0x33/0x60
? tick_sched_timer+0x3d/0x80
? ktime_get+0x3e/0xa0
run_timer_softirq+0x2a/0x50
__do_softirq+0xe1/0x2d6
? hrtimer_interrupt+0x136/0x220
irq_exit+0xae/0xb0
smp_apic_timer_interrupt+0x7b/0x140
apic_timer_interrupt+0xf/0x20
</IRQ>
Fixes: 3c5193a87b ("net/mlx5: Use del_timer_sync in fw reset flow of halting poll")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fc3d3db07b upstream.
Double clear of reset requested state can lead to NULL pointer as it
will try to delete the timer twice. This can happen for example on a
race between abort from FW and pci error or reset. Avoid such case using
test_and_clear_bit() to verify only one time reset requested state clear
flow. Similarly use test_and_set_bit() to verify only one time reset
requested state set flow.
Fixes: 7dd6df329d ("net/mlx5: Handle sync reset abort event")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
