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rts5208: Fix a sleep-in-atomic bug in sd_power_off_card3v3

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The driver may sleep under a spin lock, and the function call path is:
rtsx_exclusive_enter_ss (acquire the lock by spin_lock)
  rtsx_enter_ss
    rtsx_power_off_card
      sd_power_off_card3v3
        wait_timeout
          schedule_timeout --> may sleep

To fix it, "wait_timeout" is replaced with mdelay in sd_power_off_card3v3.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jia-Ju Bai 2017-06-01 11:49:08 +08:00 • committed by Greg Kroah-Hartman
commit 385cab7c71
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rts5208/sd.c
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@ -5231,7 +5231,7 @@ int sd_power_off_card3v3(struct rtsx_chip *chip)
return STATUS_FAIL;
}
wait_timeout(50);
mdelay(50);
}
if (chip->asic_code) {