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nvme: fix NULL derefence in nvme_ctrl_fast_io_fail_tmo_show/store 

Adding entry for dev_attr_fast_io_fail_tmo to avoid the kernel crash
while reading and writing the fast_io_fail_tmo.

Fixes: 09fbed6363 (nvme: export fast_io_fail_tmo to sysfs)
Signed-off-by: Gopal Tiwari <gtiwari@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Gopal Tiwari 2021-04-14 14:16:45 +05:30 committed by Christoph Hellwig
parent a9e0e6bc72
commit d6609084b0
1 changed files with 2 additions and 0 deletions
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2
drivers/nvme/host/core.c
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@ -3379,6 +3379,8 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj,
return 0;
if (a == &dev_attr_reconnect_delay.attr && !ctrl->opts)
return 0;
if (a == &dev_attr_fast_io_fail_tmo.attr && !ctrl->opts)
return 0;
return a->mode;
}