[PATCH] Fix NULL derefence in nvme_ctrl_fast_io_fail_tmo_show/store

[Gopal Tiwari]

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

Fixes: 09fbed636382 (nvme: export fast_io_fail_tmo to sysfs)

Signed-off-by: Gopal Tiwari <gtiwari at redhat.com>
---
 drivers/nvme/host/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d26eddf2bde4..dcf0228a6e09 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3821,6 +3821,8 @@ 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;
 }
-- 
2.26.2