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authorJayamohan Kallickal <jayamohank@gmail.com>2013-04-05 20:38:22 -0700
committerJames Bottomley <JBottomley@Parallels.com>2013-05-02 08:07:55 -0700
commita8081e346ad3f8bc2449052908095c2675a9996f (patch)
tree25e8a2afa808c5ddc762ff7e2b6cd33dc83e8e2e /drivers/scsi/be2iscsi
parent0283fbb18c873993c606a6c9660d6ac78493b37a (diff)
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[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>
Diffstat (limited to 'drivers/scsi/be2iscsi')
-rw-r--r--drivers/scsi/be2iscsi/be_cmds.c13
-rw-r--r--drivers/scsi/be2iscsi/be_cmds.h4
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 0b44cc9bd966..3ad95c7041a9 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -155,6 +155,7 @@ int beiscsi_mccq_compl(struct beiscsi_hba *phba,
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 @@ int beiscsi_mccq_compl(struct beiscsi_hba *phba,
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 @@ static int be_mcc_compl_process(struct be_ctrl_info *ctrl,
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 @@ static int be_mcc_compl_process(struct be_ctrl_info *ctrl,
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 0f8c920b88c4..a338625868e5 100644
--- a/drivers/scsi/be2iscsi/be_cmds.h
+++ b/drivers/scsi/be2iscsi/be_cmds.h
@@ -52,6 +52,10 @@ struct be_mcc_wrb {
/* 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 */