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[libata] minor fixes, new helpers 

- in ata_dev_identify(), don't assume that all devices are either
  ATA or ATAPI.  In the future, this code will see port multipliers
  and other devices.
- make a debugging printk less verbose
- add new helper ata_qc_reinit()
- add new helper BPRINTK() and port flag ATA_FLAG_DEBUGMSG, for
  fine-grained debugging use.
This commit is contained in:
Jeff Garzik 2005-11-14 14:14:16 -05:00
parent e1410f2d95
commit 2c13b7cee0
2 changed files with 17 additions and 8 deletions
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11
drivers/scsi/libata-core.c
View File

@ -1263,7 +1263,7 @@ retry:
}
/* ATAPI-specific feature tests */
else {
else if (dev->class == ATA_DEV_ATAPI) {
if (ata_id_is_ata(dev->id)) /* sanity check */
goto err_out_nosup;
@ -2399,7 +2399,7 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
if (qc->flags & ATA_QCFLAG_SINGLE)
assert(qc->n_elem == 1);
DPRINTK("unmapping %u sg elements\n", qc->n_elem);
VPRINTK("unmapping %u sg elements\n", qc->n_elem);
/* if we padded the buffer out to 32-bit bound, and data
* xfer direction is from-device, we must copy from the
@ -3432,16 +3432,11 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
qc = ata_qc_new(ap);
if (qc) {
qc->__sg = NULL;
qc->flags = 0;
qc->scsicmd = NULL;
qc->ap = ap;
qc->dev = dev;
qc->cursect = qc->cursg = qc->cursg_ofs = 0;
qc->nsect = 0;
qc->nbytes = qc->curbytes = 0;
ata_tf_init(ap, &qc->tf, dev->devno);
ata_qc_reinit(qc);
}
return qc;

14
include/linux/libata.h
View File

@ -59,6 +59,8 @@
#define VPRINTK(fmt, args...)
#endif /* ATA_DEBUG */
#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#ifdef ATA_NDEBUG
#define assert(expr)
#else
@ -119,6 +121,7 @@ enum {
ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
* proper HSM is in place. */
ATA_FLAG_DEBUGMSG = (1 << 10),
ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
@ -659,6 +662,17 @@ static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, uns
tf->device = ATA_DEVICE_OBS | ATA_DEV1;
}
static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
{
qc->__sg = NULL;
qc->flags = 0;
qc->cursect = qc->cursg = qc->cursg_ofs = 0;
qc->nsect = 0;
qc->nbytes = qc->curbytes = 0;
ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
}
/**
* ata_irq_on - Enable interrupts on a port.