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authorScott Teel <scott.teel@microsemi.com>2016-09-09 23:30:29 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2016-09-14 20:19:31 +0200
commit8383278d28b9bc598225f163b6644b8b09f2733d (patch)
tree92ff613238aec870fad16d7c5922f5ebd5530042
parentscsi: hpsa: Check for null device pointers (diff)
downloadlinux-8383278d28b9bc598225f163b6644b8b09f2733d.tar.xz
linux-8383278d28b9bc598225f163b6644b8b09f2733d.zip
scsi: hpsa: Check for vpd support before sending
Before using vendor-specific VPD pages for getting raid_level and device_id, check for page support. If page isn't supported, don't try to use it. Also, pay attention to return status on hpsa_get_device_id. [mkp: fix boolean return warnings reported by kbuild test robot] Reviewed-by: Scott Benesh <scott.benest@microsemi.com> Reviewed-by: Scott Teel <scott.teel@microsemi.com> Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/scsi/hpsa.c50
-rw-r--r--drivers/scsi/hpsa_cmd.h1
2 files changed, 38 insertions, 13 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 97f50c71b7c9..5d25e8db281c 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -293,6 +293,8 @@ static int detect_controller_lockup(struct ctlr_info *h);
static void hpsa_disable_rld_caching(struct ctlr_info *h);
static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
struct ReportExtendedLUNdata *buf, int bufsize);
+static bool hpsa_vpd_page_supported(struct ctlr_info *h,
+ unsigned char scsi3addr[], u8 page);
static int hpsa_luns_changed(struct ctlr_info *h);
static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
struct hpsa_scsi_dev_t *dev,
@@ -3088,11 +3090,19 @@ static void hpsa_get_raid_level(struct ctlr_info *h,
buf = kzalloc(64, GFP_KERNEL);
if (!buf)
return;
- rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0xC1, buf, 64);
+
+ if (!hpsa_vpd_page_supported(h, scsi3addr,
+ HPSA_VPD_LV_DEVICE_GEOMETRY))
+ goto exit;
+
+ rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
+ HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);
+
if (rc == 0)
*raid_level = buf[8];
if (*raid_level > RAID_UNKNOWN)
*raid_level = RAID_UNKNOWN;
+exit:
kfree(buf);
return;
}
@@ -3450,7 +3460,7 @@ static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
}
/* Get a device id from inquiry page 0x83 */
-static int hpsa_vpd_page_supported(struct ctlr_info *h,
+static bool hpsa_vpd_page_supported(struct ctlr_info *h,
unsigned char scsi3addr[], u8 page)
{
int rc;
@@ -3460,7 +3470,7 @@ static int hpsa_vpd_page_supported(struct ctlr_info *h,
buf = kzalloc(256, GFP_KERNEL);
if (!buf)
- return 0;
+ return false;
/* Get the size of the page list first */
rc = hpsa_scsi_do_inquiry(h, scsi3addr,
@@ -3487,10 +3497,10 @@ static int hpsa_vpd_page_supported(struct ctlr_info *h,
goto exit_supported;
exit_unsupported:
kfree(buf);
- return 0;
+ return false;
exit_supported:
kfree(buf);
- return 1;
+ return true;
}
static void hpsa_get_ioaccel_status(struct ctlr_info *h,
@@ -3539,18 +3549,25 @@ static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
int rc;
unsigned char *buf;
- if (buflen > 16)
- buflen = 16;
+ /* Does controller have VPD for device id? */
+ if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
+ return 1; /* not supported */
+
buf = kzalloc(64, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | 0x83, buf, 64);
- if (rc == 0)
- memcpy(device_id, &buf[index], buflen);
+
+ rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
+ HPSA_VPD_LV_DEVICE_ID, buf, 64);
+ if (rc == 0) {
+ if (buflen > 16)
+ buflen = 16;
+ memcpy(device_id, &buf[8], buflen);
+ }
kfree(buf);
- return rc != 0;
+ return rc; /*0 - got id, otherwise, didn't */
}
static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
@@ -3821,8 +3838,15 @@ static int hpsa_update_device_info(struct ctlr_info *h,
sizeof(this_device->model));
memset(this_device->device_id, 0,
sizeof(this_device->device_id));
- hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
- sizeof(this_device->device_id));
+ if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
+ sizeof(this_device->device_id)))
+ dev_err(&h->pdev->dev,
+ "hpsa%d: %s: can't get device id for host %d:C0:T%d:L%d\t%s\t%.16s\n",
+ h->ctlr, __func__,
+ h->scsi_host->host_no,
+ this_device->target, this_device->lun,
+ scsi_device_type(this_device->devtype),
+ this_device->model);
if ((this_device->devtype == TYPE_DISK ||
this_device->devtype == TYPE_ZBC) &&
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index a5be153d92d4..a584cdf07058 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -157,6 +157,7 @@
/* VPD Inquiry types */
#define HPSA_VPD_SUPPORTED_PAGES 0x00
+#define HPSA_VPD_LV_DEVICE_ID 0x83
#define HPSA_VPD_LV_DEVICE_GEOMETRY 0xC1
#define HPSA_VPD_LV_IOACCEL_STATUS 0xC2
#define HPSA_VPD_LV_STATUS 0xC3