summaryrefslogtreecommitdiffstats
path: root/block/elevator.c
diff options
context:
space:
mode:
authorGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com>2016-07-29 16:15:18 -0300
committerJens Axboe <axboe@fb.com>2016-08-15 09:46:46 -0600
commitf6b6a28e2dbc401416ff12f775d75281c9b41918 (patch)
tree88f3765ae063a57ee5b1180af0839f5c7be36c39 /block/elevator.c
parent694d0d0bb2030d2e36df73e2d23d5770511dbc8d (diff)
downloadlinux-0-day-f6b6a28e2dbc401416ff12f775d75281c9b41918.tar.gz
nvme: Prevent controller state invalid transition
Acquiring the nvme_ctrl lock before reading ctrl->state in nvme_change_ctrl_state() should prevent a theoretical invalid state transition, in the event of two threads racing inside that function. I haven't been able to observe this happening with the current code, and the current state machine seems to be simple enough to not be affected by these invalid transitions, but future modifications could make it more likely to happen. Signed-off-by: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: Sagi Grimberg <sag@grimberg.me> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/elevator.c')
0 files changed, 0 insertions, 0 deletions