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ide: unify interrupt reason checking

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Add ide_check_ireason() function that handles all ATAPI devices.
Reorganize all unlikely cases in ireason checking further down in the
code path.

In addition, add PFX for printks originating from ide-atapi. Finally,
remove ide_cd_check_ireason.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
This commit is contained in:
Borislav Petkov
2009-04-26 10:39:07 +02:00
parent 239f7e2534
commit 103f7033bd
3 changed files with 71 additions and 73 deletions
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47
drivers/ide/ide-cd.c
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@ -410,50 +410,6 @@ end_request:
return 2;
}
/*
* Check the contents of the interrupt reason register from the cdrom
* and attempt to recover if there are problems. Returns 0 if everything's
* ok; nonzero if the request has been terminated.
*/
static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
int len, int ireason, int rw)
{
ide_hwif_t *hwif = drive->hwif;
ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
/*
* ireason == 0: the drive wants to receive data from us
* ireason == 2: the drive is expecting to transfer data to us
*/
if (ireason == (!rw << 1))
return 0;
else if (ireason == (rw << 1)) {
/* whoops... */
printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
drive->name, __func__);
ide_pad_transfer(drive, rw, len);
} else if (rw == 0 && ireason == 1) {
/*
* Some drives (ASUS) seem to tell us that status info is
* available. Just get it and ignore.
*/
(void)hwif->tp_ops->read_status(hwif);
return 0;
} else {
/* drive wants a command packet, or invalid ireason... */
printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
drive->name, __func__, ireason);
}
if (rq->cmd_type == REQ_TYPE_ATA_PC)
rq->cmd_flags |= REQ_FAILED;
return -1;
}
static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
{
struct request *rq = cmd->rq;
@ -645,8 +601,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
goto out_end;
}
/* check which way to transfer data */
rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
rc = ide_check_ireason(drive, rq, len, ireason, write);
if (rc)
goto out_end;