media: bdisp: Fix a possible sleep-in-atomic bug in bdisp_hw_save_request

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The driver may sleep under a spinlock.
The function call path is:
bdisp_device_run (acquire the spinlock)
  bdisp_hw_update
    bdisp_hw_save_request
      devm_kzalloc(GFP_KERNEL) --> may sleep

To fix it, GFP_KERNEL is replaced with GFP_ATOMIC.

This bug is found by my static analysis tool(DSAC) and checked by my code review.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

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Jia-Ju Bai 2017-12-12 08:47:38 -05:00 • committed by Mauro Carvalho Chehab

parent c0cb76589c

commit df8ab4c601

1 changed files with 1 additions and 1 deletions

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drivers/media/platform/sti/bdisp/bdisp-hw.c

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