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| Started by | Vitaly Kuznetsov <vkuznets@redhat.com> |
|---|---|
| First post | 2015-10-30 12:50 +0100 |
| Last post | 2015-10-30 14:00 +0100 |
| Articles | 3 — 2 participants |
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[PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host Vitaly Kuznetsov <vkuznets@redhat.com> - 2015-10-30 12:50 +0100
Re: [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host Hannes Reinecke <hare@suse.de> - 2015-10-30 13:00 +0100
Re: [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host Vitaly Kuznetsov <vkuznets@redhat.com> - 2015-10-30 14:00 +0100
| From | Vitaly Kuznetsov <vkuznets@redhat.com> |
|---|---|
| Date | 2015-10-30 12:50 +0100 |
| Subject | [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host |
| Message-ID | <qpglX-5iu-13@gated-at.bofh.it> |
Some host adapters (e.g. Hyper-V storvsc) are known for not respecting the
SPC-2/3/4 requirement for 'INQUIRY data (see table ...) shall contain at
least 36 bytes'. As a result we get tons on 'scsi 0:7:1:1: scsi scan:
INQUIRY result too short (5), using 36' messages on console. This can be
problematic for slow consoles. Introduce short_inquiry flag in struct
Scsi_Host to print the message once per host.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
Changes since v3 RESEND:
- Sorry, I screwed up James address when sending 'v3 RESEND'.
Changes since v3:
- no changes, this is just a RESEND.
Changes since v2:
- This is a successor of previously sent (and still not merged) "scsi:
introduce short_inquiry flag for broken host adapters" patch. I'm not
particularly sure which solution is better but I'm leaning towards this
one as it doesn't require changes to adapter drivers.
---
drivers/scsi/scsi_scan.c | 9 ++++++---
include/scsi/scsi_host.h | 3 +++
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index f9f3f82..cd347e4 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -701,9 +701,12 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
* strings.
*/
if (sdev->inquiry_len < 36) {
- sdev_printk(KERN_INFO, sdev,
- "scsi scan: INQUIRY result too short (%d),"
- " using 36\n", sdev->inquiry_len);
+ if (!sdev->host->short_inquiry) {
+ shost_printk(KERN_INFO, sdev->host,
+ "scsi scan: INQUIRY result too short (%d),"
+ " using 36\n", sdev->inquiry_len);
+ sdev->host->short_inquiry = 1;
+ }
sdev->inquiry_len = 36;
}
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index e113c75..3a22da7 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -673,6 +673,9 @@ struct Scsi_Host {
unsigned use_blk_mq:1;
unsigned use_cmd_list:1;
+ /* Host responded with short (<36 bytes) INQUIRY result */
+ unsigned short_inquiry:1;
+
/*
* Optional work queue to be utilized by the transport
*/
--
2.4.3
--
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| From | Hannes Reinecke <hare@suse.de> |
|---|---|
| Date | 2015-10-30 13:00 +0100 |
| Subject | Re: [PATCH v3 RESEND] scsi: report 'INQUIRY result too short' once per host |
| Message-ID | <qpgvE-5lJ-9@gated-at.bofh.it> |
| In reply to | #1259429 |
On 10/30/2015 12:40 PM, Vitaly Kuznetsov wrote: > Some host adapters (e.g. Hyper-V storvsc) are known for not respecting the > SPC-2/3/4 requirement for 'INQUIRY data (see table ...) shall contain at > least 36 bytes'. As a result we get tons on 'scsi 0:7:1:1: scsi scan: > INQUIRY result too short (5), using 36' messages on console. This can be > problematic for slow consoles. Introduce short_inquiry flag in struct > Scsi_Host to print the message once per host. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > Changes since v3 RESEND: > - Sorry, I screwed up James address when sending 'v3 RESEND'. > > Changes since v3: > - no changes, this is just a RESEND. > > Changes since v2: > - This is a successor of previously sent (and still not merged) "scsi: > introduce short_inquiry flag for broken host adapters" patch. I'm not > particularly sure which solution is better but I'm leaning towards this > one as it doesn't require changes to adapter drivers. > --- > drivers/scsi/scsi_scan.c | 9 ++++++--- > include/scsi/scsi_host.h | 3 +++ > 2 files changed, 9 insertions(+), 3 deletions(-) > Why not printk_once? Should achieve the same result, and we're saving yet another flag... Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Vitaly Kuznetsov <vkuznets@redhat.com> |
|---|---|
| Date | 2015-10-30 14:00 +0100 |
| Message-ID | <qphrI-5Uv-9@gated-at.bofh.it> |
| In reply to | #1259435 |
Hannes Reinecke <hare@suse.de> writes: > On 10/30/2015 12:40 PM, Vitaly Kuznetsov wrote: >> Some host adapters (e.g. Hyper-V storvsc) are known for not respecting the >> SPC-2/3/4 requirement for 'INQUIRY data (see table ...) shall contain at >> least 36 bytes'. As a result we get tons on 'scsi 0:7:1:1: scsi scan: >> INQUIRY result too short (5), using 36' messages on console. This can be >> problematic for slow consoles. Introduce short_inquiry flag in struct >> Scsi_Host to print the message once per host. >> >> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> >> --- >> Changes since v3 RESEND: >> - Sorry, I screwed up James address when sending 'v3 RESEND'. >> >> Changes since v3: >> - no changes, this is just a RESEND. >> >> Changes since v2: >> - This is a successor of previously sent (and still not merged) "scsi: >> introduce short_inquiry flag for broken host adapters" patch. I'm not >> particularly sure which solution is better but I'm leaning towards this >> one as it doesn't require changes to adapter drivers. >> --- >> drivers/scsi/scsi_scan.c | 9 ++++++--- >> include/scsi/scsi_host.h | 3 +++ >> 2 files changed, 9 insertions(+), 3 deletions(-) >> > Why not printk_once? > Should achieve the same result, and we're saving yet another flag... > It seems it makes sense to print this warning per-host (as we can have many hosts) and not just once. It's hard to come up with a reasonable message for printk_once() -- "some of your SCSI devices are buggy" sounds to vague. Here we say "this particular scsi controller is buggy". -- Vitaly -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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