block: Fix dev_t minor allocation lifetime

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Releases the dev_t minor when all references are closed to prevent
another device from acquiring the same major/minor.

Since the partition's release may be invoked from call_rcu's soft-irq
context, the ext_dev_idr's mutex had to be replaced with a spinlock so
as not so sleep.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>

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Keith Busch 2014-08-26 09:05:36 -06:00 • committed by Jens Axboe

parent 5676e7b6db

commit 2da78092dd

2 changed files with 15 additions and 11 deletions

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24

block/genhd.c

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2

block/partition-generic.c

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