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qla2x00t-32gbit: Fix serialization of DCBX TLV data request

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Commit b6faaaf796d7 ("scsi: qla2xxx: Serialize mailbox request") serialized
mailbox requests from userspace using the 'optrom' mutex. However, in the
case of DCBX TLV data, if the memory for it is already allocated, then the
mailbox request ends up not being serialized because it is done without
holding the 'optrom' mutex.

Link: https://lore.kernel.org/r/20220926230245.790508-1-rafaelmendsr@gmail.com
Fixes: b6faaaf796d7 ("scsi: qla2xxx: Serialize mailbox request")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
[ commit 3ddeabd1536a upstream ]
This commit is contained in:
Gleb Chesnokov
2022-11-09 11:07:21 +03:00
parent 6172938313
commit 47202a1adf
1 changed files with 1 additions and 1 deletions
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qla2x00t-32gbit/qla_attr.c
+1 -1
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@@ -951,9 +951,9 @@ qla2x00_sysfs_read_dcbx_tlv(struct file *filp, struct kobject *kobj,
if (!capable(CAP_SYS_ADMIN) || off != 0 || count > DCBX_TLV_DATA_SIZE)
return 0;
mutex_lock(&vha->hw->optrom_mutex);
if (ha->dcbx_tlv)
goto do_read;
mutex_lock(&vha->hw->optrom_mutex);
if (qla2x00_chip_is_down(vha)) {
mutex_unlock(&vha->hw->optrom_mutex);
return 0;