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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2008-06-10 10:20:53 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-06-10 10:31:23 -0500
commitd1daeabf0da5bfa1943272ce508e2ba785730bf0 (patch)
treea013f2e673fc8631e86f2f9be433032359412433 /drivers/scsi
parent5e70b7f3c24468bb1635b295945edb48ecd9656a (diff)
[SCSI] sr: fix corrupt CD data after media change and delay
Reported-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> If you delay 30s or more before mounting a CD after inserting it then the kernel has the wrong value for the CD size. http://marc.info/?t=121276133000001 The problem is in sr_test_unit_ready(): the function eats unit attentions without adjusting the sdev->changed status. This means that when the CD signals changed media via unit attention, we can ignore it. Fix by making sr_test_unit_ready() adjust the changed status. Tested-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Stable Tree <stable@kernel.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/sr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 7ee86d4a7618..c82df8bd4d89 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -178,6 +178,9 @@ int sr_test_unit_ready(struct scsi_device *sdev, struct scsi_sense_hdr *sshdr)
the_result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL,
0, sshdr, SR_TIMEOUT,
retries--);
+ if (scsi_sense_valid(sshdr) &&
+ sshdr->sense_key == UNIT_ATTENTION)
+ sdev->changed = 1;
} while (retries > 0 &&
(!scsi_status_is_good(the_result) ||