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[SCSI] libsas: fix taskfile corruption in sas_ata_qc_fill_rtf

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fill_result_tf() grabs the taskfile flags from the originating qc which
sas_ata_qc_fill_rtf() promptly overwrites.  The presence of an
ata_taskfile in the sata_device makes it tempting to just copy the full
contents in sas_ata_qc_fill_rtf().  However, libata really only wants
the fis contents and expects the other portions of the taskfile to not
be touched by ->qc_fill_rtf.  To that end store a fis buffer in the
sata_device and use ata_tf_from_fis() like every other ->qc_fill_rtf()
implementation.

Cc: <stable@vger.kernel.org>
Reported-by: Praveen Murali <pmurali@logicube.com>
Tested-by: Praveen Murali <pmurali@logicube.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2012-06-22 10:52:34 -07:00 committed by James Bottomley
parent 222a806af8
commit 6ef1b512f4
3 changed files with 11 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/aic94xx/aic94xx_task.c
View File

@ -201,7 +201,7 @@ static void asd_get_response_tasklet(struct asd_ascb *ascb,
if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
memcpy(&resp->ending_fis[0], r+16, 24);
memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
ts->buf_valid_size = sizeof(*resp);
}
}

12
drivers/scsi/libsas/sas_ata.c
View File

@ -139,12 +139,12 @@ static void sas_ata_task_done(struct sas_task *task)
if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
((stat->stat == SAM_STAT_CHECK_CONDITION &&
dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
if (!link->sactive) {
qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
} else {
link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command);
link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
if (unlikely(link->eh_info.err_mask))
qc->flags |= ATA_QCFLAG_FAILED;
}
@ -161,8 +161,8 @@ static void sas_ata_task_done(struct sas_task *task)
qc->flags |= ATA_QCFLAG_FAILED;
}
dev->sata_dev.tf.feature = 0x04; /* status err */
dev->sata_dev.tf.command = ATA_ERR;
dev->sata_dev.fis[3] = 0x04; /* status err */
dev->sata_dev.fis[2] = ATA_ERR;
}
}
@ -269,7 +269,7 @@ static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
{
struct domain_device *dev = qc->ap->private_data;
memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf));
ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
return true;
}

6
include/scsi/libsas.h
View File

@ -163,6 +163,8 @@ enum ata_command_set {
ATAPI_COMMAND_SET = 1,
};
#define ATA_RESP_FIS_SIZE 24
struct sata_device {
enum ata_command_set command_set;
struct smp_resp rps_resp; /* report_phy_sata_resp */
@ -171,7 +173,7 @@ struct sata_device {
struct ata_port *ap;
struct ata_host ata_host;
struct ata_taskfile tf;
u8 fis[ATA_RESP_FIS_SIZE];
};
enum {
@ -537,7 +539,7 @@ enum exec_status {
*/
struct ata_task_resp {
u16 frame_len;
u8 ending_fis[24]; /* dev to host or data-in */
u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
};
#define SAS_STATUS_BUF_SIZE 96