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rts5208: Fix a sleep-in-atomic bug in sd_power_off_card3v3
authorJia-Ju Bai <baijiaju1990@163.com>
Thu, 1 Jun 2017 03:49:08 +0000 (11:49 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 3 Jun 2017 08:52:00 +0000 (17:52 +0900)
commit385cab7c7131083cbe09d5f1d06df4544caa272d
tree526f98c10a4e6f7e6d5df53468fd7c3e82cb4fe4tree | snapshot (tar.gz zip)
parenta0eee1b6dabd79019196fd1d1a66eeb93788867acommit | diff
rts5208: Fix a sleep-in-atomic bug in sd_power_off_card3v3

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>
drivers/staging/rts5208/sd.c diff | blob | blame | history