commit 21c9e160a51383d4cb0b882398534b0c95c0cc3b implemented a
new driver lookup using the MR_DCMD_LD_LIST_QUERY firmware command.
However, this command might not work properly on older firmware,
causing the command to return no drives instead of an error.
This causes a regression on older firmware as the driver will
no longer detect any drives.
This patch checks if MR_DCMD_LD_LIST_QUERY return no drives,
and falls back to the original method if so.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index f97ec34..79dff70 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -4107,6 +4107,10 @@ megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
ret = megasas_issue_polled(instance, cmd);
tgtid_count = le32_to_cpu(ci->count);
+ if (tgtid_count == 0) {
+ /* No drives found, try the older LD list DCMD */
+ ret = 1;
+ }
if ((ret == 0) && (tgtid_count <= (instance->fw_supported_vd_count))) {
memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
--
1.8.5.6
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