Commit dfcf7775 authored Aug 11, 2011 by TARUISI Hiroaki Committed by James Bottomley Aug 27, 2011

[SCSI] Fix out of spec CD-ROM problem with media change



Some CD-ROMs fail to report a media change correctly.  The specific
one for this patch simply fails to respond to commands, then gives a
UNIT ATTENTION after being reset which returns ASC/ASCQ 28/00.  This
is out of spec behaviour, but add a check in the eat CC/UA on reset
path to catch this case so the CD-ROM will function somewhat properly.

[jejb: fixed up white space and accepted without signoff]
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

parent 2ada7fc5

drivers/scsi/scsi_error.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -293,9 +293,17 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
		* so that we can deal with it there.
		*/
		if (scmd->device->expecting_cc_ua) {
		/*
		* Because some device does not queue unit
		* attentions correctly, we carefully check
		* additional sense code and qualifier so as
		* not to squash media change unit attention.
		*/
		if (sshdr.asc != 0x28 \|\| sshdr.ascq != 0x00) {
		scmd->device->expecting_cc_ua = 0;
		return NEEDS_RETRY;
		}
		}
		/*
		* if the device is in the process of becoming ready, we
		* should retry.