[PATCH] libata: make the owner of a qc responsible for freeing it
qc used to be freed automatically on command completion. However, as
a qc can carry information about its completion status, it can be
useful to its owner/issuer after command completion. This patch makes
freeing qc responsibility of its owner. This simplifies
ata_exec_internal() and makes command turn-around for atapi request
sensing less hackish.
This change was originally suggested by Jeff Garzik.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 0e65bfe9..ce3fe92 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -1219,7 +1219,7 @@
return 1;
}
-static int ata_scsi_qc_complete(struct ata_queued_cmd *qc)
+static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
u8 *cdb = cmd->cmnd;
@@ -1256,7 +1256,7 @@
qc->scsidone(cmd);
- return 0;
+ ata_qc_free(qc);
}
/**
@@ -1982,7 +1982,7 @@
done(cmd);
}
-static int atapi_sense_complete(struct ata_queued_cmd *qc)
+static void atapi_sense_complete(struct ata_queued_cmd *qc)
{
if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
/* FIXME: not quite right; we don't want the
@@ -1993,7 +1993,7 @@
ata_gen_ata_desc_sense(qc);
qc->scsidone(qc->scsicmd);
- return 0;
+ ata_qc_free(qc);
}
/* is it pointless to prefer PIO for "safety reasons"? */
@@ -2050,7 +2050,7 @@
DPRINTK("EXIT\n");
}
-static int atapi_qc_complete(struct ata_queued_cmd *qc)
+static void atapi_qc_complete(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
unsigned int err_mask = qc->err_mask;
@@ -2060,7 +2060,7 @@
if (unlikely(err_mask & AC_ERR_DEV)) {
cmd->result = SAM_STAT_CHECK_CONDITION;
atapi_request_sense(qc);
- return 1;
+ return;
}
else if (unlikely(err_mask))
@@ -2100,7 +2100,7 @@
}
qc->scsidone(cmd);
- return 0;
+ ata_qc_free(qc);
}
/**
* atapi_xlat - Initialize PACKET taskfile