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authorVitaly Kuznetsov <vkuznets@redhat.com>2015-11-19 14:17:06 +0100
committerMartin K. Petersen <martin.petersen@oracle.com>2015-11-19 12:12:16 -0500
commita35bb4458e5e5c9dc19a0daa0629409285f3b25e (patch)
tree89a7b95f484abe44f3381d69ef8346eb9fedaeb7
parent757b22f9d56fb4e510782b29da752824daddf3c8 (diff)
downloadlinux-a35bb4458e5e5c9dc19a0daa0629409285f3b25e.tar.bz2
scsi: report 'INQUIRY result too short' once per host
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> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/scsi/scsi_scan.c9
-rw-r--r--include/scsi/scsi_host.h3
2 files changed, 9 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index d01e423ef44b..403a63310fb1 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -702,9 +702,12 @@ 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 e113c757d555..3a22da73d59a 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
*/