This is a note to let you know that I've just added the patch titled
scsi: hisi_sas: Modify v3 HW SSP underflow error processing
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-hisi_sas-modify-v3-hw-ssp-underflow-error-proce.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ed6544705a61c76b7fc56bddab806360d7f36a0c
Author: Xingui Yang <yangxingui@xxxxxxxxxx>
Date: Thu Feb 24 19:51:29 2022 +0800
scsi: hisi_sas: Modify v3 HW SSP underflow error processing
[ Upstream commit 62413199cd6d2906c121c2dfa3d7b82fd05f08db ]
In case of SSP underflow allow the response frame IU to be examined for
setting the response stat value rather than always setting
SAS_DATA_UNDERRUN.
This will mean that we call sas_ssp_task_response() in those scenarios and
may send sense data to upper layer.
Such a condition would be for bad blocks were we just reporting an
underflow error to upper layer, but now the sense data will tell
immediately that the media is faulty.
Link: https://lore.kernel.org/r/1645703489-87194-7-git-send-email-john.garry@xxxxxxxxxx
Signed-off-by: Xingui Yang <yangxingui@xxxxxxxxxx>
Signed-off-by: Qi Liu <liuqi115@xxxxxxxxxx>
Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Stable-dep-of: f5393a5602ca ("scsi: hisi_sas: Fix normally completed I/O analysed as failed")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 59ac0f8e6d5c3..937e4ba46134e 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -392,6 +392,8 @@
#define CMPLT_HDR_ERROR_PHASE_MSK (0xff << CMPLT_HDR_ERROR_PHASE_OFF)
#define CMPLT_HDR_RSPNS_XFRD_OFF 10
#define CMPLT_HDR_RSPNS_XFRD_MSK (0x1 << CMPLT_HDR_RSPNS_XFRD_OFF)
+#define CMPLT_HDR_RSPNS_GOOD_OFF 11
+#define CMPLT_HDR_RSPNS_GOOD_MSK (0x1 << CMPLT_HDR_RSPNS_GOOD_OFF)
#define CMPLT_HDR_ERX_OFF 12
#define CMPLT_HDR_ERX_MSK (0x1 << CMPLT_HDR_ERX_OFF)
#define CMPLT_HDR_ABORT_STAT_OFF 13
@@ -2115,7 +2117,7 @@ static irqreturn_t fatal_axi_int_v3_hw(int irq_no, void *p)
return IRQ_HANDLED;
}
-static void
+static bool
slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
struct hisi_sas_slot *slot)
{
@@ -2133,6 +2135,15 @@ slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
switch (task->task_proto) {
case SAS_PROTOCOL_SSP:
if (dma_rx_err_type & RX_DATA_LEN_UNDERFLOW_MSK) {
+ /*
+ * If returned response frame is incorrect because of data underflow,
+ * but I/O information has been written to the host memory, we examine
+ * response IU.
+ */
+ if (!(complete_hdr->dw0 & CMPLT_HDR_RSPNS_GOOD_MSK) &&
+ (complete_hdr->dw0 & CMPLT_HDR_RSPNS_XFRD_MSK))
+ return false;
+
ts->residual = trans_tx_fail_type;
ts->stat = SAS_DATA_UNDERRUN;
} else if (dw3 & CMPLT_HDR_IO_IN_TARGET_MSK) {
@@ -2164,6 +2175,7 @@ slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
default:
break;
}
+ return true;
}
static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
@@ -2238,19 +2250,20 @@ static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
if ((dw0 & CMPLT_HDR_CMPLT_MSK) == 0x3) {
u32 *error_info = hisi_sas_status_buf_addr_mem(slot);
- slot_err_v3_hw(hisi_hba, task, slot);
- if (ts->stat != SAS_DATA_UNDERRUN)
- dev_info(dev, "erroneous completion iptt=%d task=%pK dev id=%d addr=%016llx CQ hdr: 0x%x 0x%x 0x%x 0x%x Error info: 0x%x 0x%x 0x%x 0x%x\n",
- slot->idx, task, sas_dev->device_id,
- SAS_ADDR(device->sas_addr),
- dw0, dw1, complete_hdr->act, dw3,
- error_info[0], error_info[1],
- error_info[2], error_info[3]);
- if (unlikely(slot->abort)) {
- sas_task_abort(task);
- return;
+ if (slot_err_v3_hw(hisi_hba, task, slot)) {
+ if (ts->stat != SAS_DATA_UNDERRUN)
+ dev_info(dev, "erroneous completion iptt=%d task=%pK dev id=%d addr=%016llx CQ hdr: 0x%x 0x%x 0x%x 0x%x Error info: 0x%x 0x%x 0x%x 0x%x\n",
+ slot->idx, task, sas_dev->device_id,
+ SAS_ADDR(device->sas_addr),
+ dw0, dw1, complete_hdr->act, dw3,
+ error_info[0], error_info[1],
+ error_info[2], error_info[3]);
+ if (unlikely(slot->abort)) {
+ sas_task_abort(task);
+ return;
+ }
+ goto out;
}
- goto out;
}
switch (task->task_proto) {
