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authorSeungwon Jeon <tgih.jun@samsung.com>2013-08-31 21:40:19 +0530
committerJames Bottomley <JBottomley@Parallels.com>2013-09-06 15:57:55 -0700
commit1c2623c50dfd38c823a62c57af2ca9551a861b21 (patch)
tree605ff68795ada0019cffae758f41c71dcd070557 /drivers/scsi
parent2b4857c30ed04e4e5c1dd88516a4388d2919e3ff (diff)
downloadlinux-1c2623c50dfd38c823a62c57af2ca9551a861b21.tar.bz2
[SCSI] ufs: find out sense data over scsi status values
Unlike 'GOOD' and 'CHECK CONDITION', other status values in Response UPIU may or may not contain sense data. That is returning sense data isn't obvious. So, in this case the Data Segment Length field should be checked. If a non-zero value, it means that UPIU has Sense Data in the Data Segment area. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Tested-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ufs/ufs.h1
-rw-r--r--drivers/scsi/ufs/ufshcd.c37
2 files changed, 23 insertions, 15 deletions
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index bce09a6898c4..721050090520 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -177,6 +177,7 @@ enum {
MASK_TASK_RESPONSE = 0xFF00,
MASK_RSP_UPIU_RESULT = 0xFFFF,
MASK_QUERY_DATA_SEG_LEN = 0xFFFF,
+ MASK_RSP_UPIU_DATA_SEG_LEN = 0xFFFF,
MASK_RSP_EXCEPTION_EVENT = 0x10000,
};
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b36ca9a2dfbb..6c34f6ae8870 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -260,6 +260,20 @@ ufshcd_get_rsp_upiu_result(struct utp_upiu_rsp *ucd_rsp_ptr)
return be32_to_cpu(ucd_rsp_ptr->header.dword_1) & MASK_RSP_UPIU_RESULT;
}
+/*
+ * ufshcd_get_rsp_upiu_data_seg_len - Get the data segment length
+ * from response UPIU
+ * @ucd_rsp_ptr: pointer to response UPIU
+ *
+ * Return the data segment length.
+ */
+static inline unsigned int
+ufshcd_get_rsp_upiu_data_seg_len(struct utp_upiu_rsp *ucd_rsp_ptr)
+{
+ return be32_to_cpu(ucd_rsp_ptr->header.dword_2) &
+ MASK_RSP_UPIU_DATA_SEG_LEN;
+}
+
/**
* ufshcd_is_exception_event - Check if the device raised an exception event
* @ucd_rsp_ptr: pointer to response UPIU
@@ -355,7 +369,8 @@ void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp)
{
int len;
- if (lrbp->sense_buffer) {
+ if (lrbp->sense_buffer &&
+ ufshcd_get_rsp_upiu_data_seg_len(lrbp->ucd_rsp_ptr)) {
len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len);
memcpy(lrbp->sense_buffer,
lrbp->ucd_rsp_ptr->sr.sense_data,
@@ -1788,32 +1803,24 @@ ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status)
int result = 0;
switch (scsi_status) {
- case SAM_STAT_GOOD:
- result |= DID_OK << 16 |
- COMMAND_COMPLETE << 8 |
- SAM_STAT_GOOD;
- break;
case SAM_STAT_CHECK_CONDITION:
+ ufshcd_copy_sense_data(lrbp);
+ case SAM_STAT_GOOD:
result |= DID_OK << 16 |
COMMAND_COMPLETE << 8 |
- SAM_STAT_CHECK_CONDITION;
- ufshcd_copy_sense_data(lrbp);
- break;
- case SAM_STAT_BUSY:
- result |= SAM_STAT_BUSY;
+ scsi_status;
break;
case SAM_STAT_TASK_SET_FULL:
-
/*
* If a LUN reports SAM_STAT_TASK_SET_FULL, then the LUN queue
* depth needs to be adjusted to the exact number of
* outstanding commands the LUN can handle at any given time.
*/
ufshcd_adjust_lun_qdepth(lrbp->cmd);
- result |= SAM_STAT_TASK_SET_FULL;
- break;
+ case SAM_STAT_BUSY:
case SAM_STAT_TASK_ABORTED:
- result |= SAM_STAT_TASK_ABORTED;
+ ufshcd_copy_sense_data(lrbp);
+ result |= scsi_status;
break;
default:
result |= DID_ERROR << 16;