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authorAlbert Lee <albertcc@tw.ibm.com>2007-04-01 23:30:46 -0400
committerJeff Garzik <jeff@garzik.org>2007-04-04 02:12:27 -0400
commit56287768e31268969abd94b38b931a29d1ced1ce (patch)
tree1d43f1c19012dd75feb0028dacb22b9bd0d1e1eb /drivers/ata/libata-eh.c
parent7152764700559b6a4041fdaba345df9a5cd962f0 (diff)
libata: Clear tf before doing request sense (take 3)
patch 2/4: Clear tf before doing request sense. This fixes the AOpen 56X/AKH timeout problem. (http://bugzilla.kernel.org/show_bug.cgi?id=8244) Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-eh.c')
-rw-r--r--drivers/ata/libata-eh.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index c89664a77a9c..39f556c02992 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -982,26 +982,27 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
982 * RETURNS: 982 * RETURNS:
983 * 0 on success, AC_ERR_* mask on failure 983 * 0 on success, AC_ERR_* mask on failure
984 */ 984 */
985static unsigned int atapi_eh_request_sense(struct ata_device *dev, 985static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
986 unsigned char *sense_buf)
987{ 986{
987 struct ata_device *dev = qc->dev;
988 unsigned char *sense_buf = qc->scsicmd->sense_buffer;
988 struct ata_port *ap = dev->ap; 989 struct ata_port *ap = dev->ap;
989 struct ata_taskfile tf; 990 struct ata_taskfile tf;
990 u8 cdb[ATAPI_CDB_LEN]; 991 u8 cdb[ATAPI_CDB_LEN];
991 992
992 DPRINTK("ATAPI request sense\n"); 993 DPRINTK("ATAPI request sense\n");
993 994
994 ata_tf_init(dev, &tf);
995
996 /* FIXME: is this needed? */ 995 /* FIXME: is this needed? */
997 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); 996 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
998 997
999 /* XXX: why tf_read here? */ 998 /* initialize sense_buf with the error register,
1000 ap->ops->tf_read(ap, &tf); 999 * for the case where they are -not- overwritten
1001 1000 */
1002 /* fill these in, for the case where they are -not- overwritten */
1003 sense_buf[0] = 0x70; 1001 sense_buf[0] = 0x70;
1004 sense_buf[2] = tf.feature >> 4; 1002 sense_buf[2] = qc->result_tf.feature >> 4;
1003
1004 /* some devices time out if garbage left in tf */
1005 ata_tf_init(dev, &tf);
1005 1006
1006 memset(cdb, 0, ATAPI_CDB_LEN); 1007 memset(cdb, 0, ATAPI_CDB_LEN);
1007 cdb[0] = REQUEST_SENSE; 1008 cdb[0] = REQUEST_SENSE;
@@ -1165,8 +1166,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
1165 1166
1166 case ATA_DEV_ATAPI: 1167 case ATA_DEV_ATAPI:
1167 if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) { 1168 if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) {
1168 tmp = atapi_eh_request_sense(qc->dev, 1169 tmp = atapi_eh_request_sense(qc);
1169 qc->scsicmd->sense_buffer);
1170 if (!tmp) { 1170 if (!tmp) {
1171 /* ATA_QCFLAG_SENSE_VALID is used to 1171 /* ATA_QCFLAG_SENSE_VALID is used to
1172 * tell atapi_qc_complete() that sense 1172 * tell atapi_qc_complete() that sense