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authorRafael J. Wysocki <rjw@sisk.pl>2009-08-05 23:56:54 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2009-08-05 23:56:54 +0200
commitc00aafcd4977769e8728292302ddbbb8b1082fab (patch)
tree5766bcfbfd7b24816b54298b8ef34054f8cf0fae /drivers/scsi/sd.c
parent2e6713c7662cc5ebc7346b033c404cb2f708fd51 (diff)
parent90bc1a658a53f8832ee799685703977a450e5af9 (diff)
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/scsi/sd.c')
-rw-r--r--drivers/scsi/sd.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 5616cd780ff..b7b9fec67a9 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1840,6 +1840,18 @@ static void sd_read_block_characteristics(struct scsi_disk *sdkp)
kfree(buffer);
}
+static int sd_try_extended_inquiry(struct scsi_device *sdp)
+{
+ /*
+ * Although VPD inquiries can go to SCSI-2 type devices,
+ * some USB ones crash on receiving them, and the pages
+ * we currently ask for are for SPC-3 and beyond
+ */
+ if (sdp->scsi_level > SCSI_SPC_2)
+ return 1;
+ return 0;
+}
+
/**
* sd_revalidate_disk - called the first time a new disk is seen,
* performs disk spin up, read_capacity, etc.
@@ -1877,8 +1889,12 @@ static int sd_revalidate_disk(struct gendisk *disk)
*/
if (sdkp->media_present) {
sd_read_capacity(sdkp, buffer);
- sd_read_block_limits(sdkp);
- sd_read_block_characteristics(sdkp);
+
+ if (sd_try_extended_inquiry(sdp)) {
+ sd_read_block_limits(sdkp);
+ sd_read_block_characteristics(sdkp);
+ }
+
sd_read_write_protect_flag(sdkp, buffer);
sd_read_cache_type(sdkp, buffer);
sd_read_app_tag_own(sdkp, buffer);