block: sunvdc: add check for mdesc_grab() returning NULL

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[ Upstream commit 6030363199 ]

In vdc_port_probe(), we should check the return value of mdesc_grab() as
it may return NULL, which can cause potential NPD bug.

Fixes: 43fdf27470 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.")
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20230315062032.1741692-1-windhl@126.com
[axboe: style cleanup]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Liang He 2023-03-15 14:20:32 +08:00 • committed by Greg Kroah-Hartman

parent 8ed9813871

commit a6633022d7

1 changed files with 2 additions and 0 deletions

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drivers/block/sunvdc.c

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