block: grab a device refcount in disk_uevent
authorChristoph Hellwig <hch@lst.de>
Thu, 1 Jul 2021 08:16:37 +0000 (10:16 +0200)
committerJens Axboe <axboe@kernel.dk>
Thu, 1 Jul 2021 16:21:24 +0000 (10:21 -0600)
commit498dcc13fd6463de29b94e160f40ed04d5477cd8
treefac09e7780f90adc89db1d48fa7140a37e11af70
parent2b7a8dc06d0f840345ae3c7ed6f9d55962b5f54a
block: grab a device refcount in disk_uevent

Sending uevents requires the struct device to be alive.  To
ensure that grab the device refcount instead of just an inode
reference.

Fixes: bc359d03c7ec ("block: add a disk_uevent helper")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210701081638.246552-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/genhd.c