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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-10-09 16:45:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-20 10:05:01 +0100 |
| commit | 2e03af22f65c67c1b0dcb0f98eee9061fe3bc0da (patch) | |
| tree | ce66a235bf5c06b434fc9f0fade1209b810df36a | |
| parent | 930fb06d16171744f3ec3ca23cb3618f27bfd01b (diff) | |
| download | linux-stable-2e03af22f65c67c1b0dcb0f98eee9061fe3bc0da.tar.gz linux-stable-2e03af22f65c67c1b0dcb0f98eee9061fe3bc0da.tar.bz2 linux-stable-2e03af22f65c67c1b0dcb0f98eee9061fe3bc0da.zip | |
vt6655: Fix a possible sleep-in-atomic bug in vt6655_suspend
[ Upstream commit 42c8eb3f6e15367981b274cb79ee4657e2c6949d ]
The driver may sleep under a spinlock, and the function call path is:
vt6655_suspend (acquire the spinlock)
pci_set_power_state
__pci_start_power_transition (drivers/pci/pci.c)
msleep --> may sleep
To fix it, pci_set_power_state is called without having a spinlock.
This bug is found by my static analysis tool and my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/vt6655/device_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c index fefbf826c622..8fd8f3a2d1bf 100644 --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -1693,10 +1693,11 @@ static int vt6655_suspend(struct pci_dev *pcid, pm_message_t state) MACbShutdown(priv->PortOffset); pci_disable_device(pcid); - pci_set_power_state(pcid, pci_choose_state(pcid, state)); spin_unlock_irqrestore(&priv->lock, flags); + pci_set_power_state(pcid, pci_choose_state(pcid, state)); + return 0; } |