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(parent: 06d2d64) | patch
isdn: Fix a sleep-in-atomic bug
authorJia-Ju Bai <baijiaju1990@163.com>
Wed, 31 May 2017 01:40:11 +0000 (09:40 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 31 May 2017 18:38:10 +0000 (14:38 -0400)
commite8f4ae85439f34bec3b0ab69223a41809dab28c9
tree06a335def58c9f7583e4ea9c45005abbdbf97e83tree | snapshot (tar.gz zip)
parent06d2d6431bc8d41ef5ffd8bd4b52cea9f72aed22commit | diff
isdn: Fix a sleep-in-atomic bug

The driver may sleep under a spin lock, the function call path is:
isdn_ppp_mp_receive (acquire the lock)
  isdn_ppp_mp_reassembly
    isdn_ppp_push_higher
      isdn_ppp_decompress
        isdn_ppp_ccp_reset_trans
          isdn_ppp_ccp_reset_alloc_state
            kzalloc(GFP_KERNEL) --> may sleep

To fixed it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/isdn/i4l/isdn_ppp.c diff | blob | blame | history