scsi: qla2xxx: Check valid rport returned by fc_bsg_to_rport()

stable inclusion
from stable-v5.10.188
commit 921d6844625527a92d1178262a633cc88a8e61bd
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KYFP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=921d6844625527a92d1178262a633cc88a8e61bd



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commit af73f23a upstream.

Klocwork reported warning of rport maybe NULL and will be dereferenced.
rport returned by call to fc_bsg_to_rport() could be NULL and dereferenced.

Check valid rport returned by fc_bsg_to_rport().

Cc: stable@vger.kernel.org
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20230607113843.37185-5-njavali@marvell.com


Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>