[SCSI] be2iscsi: Fix returning Failure when MBX fails with Insufficient buffer error
When MBX command fails with insufficent buffer, check for the
response lenght returned. Return success if response length
is non-zero value which indicates valid data.
Signed-off-by: Minh Tran <minhduc.tran@emulex.com>
Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 0b44cc9..3ad95c7 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -155,6 +155,7 @@
uint16_t status = 0, addl_status = 0, wrb_num = 0;
struct be_mcc_wrb *temp_wrb;
struct be_cmd_req_hdr *ioctl_hdr;
+ struct be_cmd_resp_hdr *ioctl_resp_hdr;
struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
if (beiscsi_error(phba))
@@ -204,6 +205,12 @@
ioctl_hdr->subsystem,
ioctl_hdr->opcode,
status, addl_status);
+
+ if (status == MCC_STATUS_INSUFFICIENT_BUFFER) {
+ ioctl_resp_hdr = (struct be_cmd_resp_hdr *) ioctl_hdr;
+ if (ioctl_resp_hdr->response_length)
+ goto release_mcc_tag;
+ }
rc = -EAGAIN;
}
@@ -267,6 +274,7 @@
struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
struct beiscsi_hba *phba = pci_get_drvdata(ctrl->pdev);
struct be_cmd_req_hdr *hdr = embedded_payload(wrb);
+ struct be_cmd_resp_hdr *resp_hdr;
be_dws_le_to_cpu(compl, 4);
@@ -284,6 +292,11 @@
hdr->subsystem, hdr->opcode,
compl_status, extd_status);
+ if (compl_status == MCC_STATUS_INSUFFICIENT_BUFFER) {
+ resp_hdr = (struct be_cmd_resp_hdr *) hdr;
+ if (resp_hdr->response_length)
+ return 0;
+ }
return -EBUSY;
}
return 0;
diff --git a/drivers/scsi/be2iscsi/be_cmds.h b/drivers/scsi/be2iscsi/be_cmds.h
index 0f8c920..a338625 100644
--- a/drivers/scsi/be2iscsi/be_cmds.h
+++ b/drivers/scsi/be2iscsi/be_cmds.h
@@ -52,6 +52,10 @@
/* Completion Status */
#define MCC_STATUS_SUCCESS 0x0
+#define MCC_STATUS_FAILED 0x1
+#define MCC_STATUS_ILLEGAL_REQUEST 0x2
+#define MCC_STATUS_ILLEGAL_FIELD 0x3
+#define MCC_STATUS_INSUFFICIENT_BUFFER 0x4
#define CQE_STATUS_COMPL_MASK 0xFFFF
#define CQE_STATUS_COMPL_SHIFT 0 /* bits 0 - 15 */