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ide-cd: merge cdrom_write_check_ireason() and cdrom_read_check_ireason() 

Add 'rw' parameter to cdrom_read_check_ireason(), make it handle
both read and write checking, rename it to ide_cd_check_ireason(),
finally remove no longer needed cdrom_write_check_ireason().

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-02-01 23:09:28 +01:00
parent 0041e7c6ca
commit 0d6f7e3a18
1 changed files with 15 additions and 49 deletions
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64
drivers/ide/ide-cd.c
View File

@ -683,21 +683,25 @@ static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector,
* ok; nonzero if the request has been terminated.
*/
static
int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
int ide_cd_check_ireason(ide_drive_t *drive, int len, int ireason, int rw)
{
if (ireason == 2)
/*
* 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 == 0) {
else if (ireason == (rw << 1)) {
ide_hwif_t *hwif = drive->hwif;
xfer_func_t *xf;
/* Whoops... The drive is expecting to receive data from us! */
/* Whoops... */
printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
drive->name, __FUNCTION__);
/* Throw some data at the drive so it doesn't hang
and quit this request. */
ide_cd_pad_transfer(drive, hwif->atapi_output_bytes, len);
} else if (ireason == 1) {
xf = rw ? hwif->atapi_output_bytes : hwif->atapi_input_bytes;
ide_cd_pad_transfer(drive, xf, len);
} else if (rw == 0 && ireason == 1) {
/* Some drives (ASUS) seem to tell us that status
* info is available. just get it and ignore.
*/
@ -984,35 +988,6 @@ int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
}
/*
* Write handling
*/
static int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
{
/* Two notes about IDE interrupt reason here - 0 means that
* the drive wants to receive data from us, 2 means that
* the drive is expecting to transfer data to us.
*/
if (ireason == 0)
return 0;
else if (ireason == 2) {
ide_hwif_t *hwif = drive->hwif;
/* Whoops... The drive wants to send data. */
printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
drive->name, __FUNCTION__);
ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len);
} else {
/* Drive wants a command packet, or invalid ireason... */
printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
drive->name, __FUNCTION__, ireason);
}
cdrom_end_request(drive, 0);
return 1;
}
/*
* Called from blk_end_request_callback() after the data of the request
* is completed and before the request is completed.
@ -1108,20 +1083,11 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
/*
* check which way to transfer data
*/
if ((blk_fs_request(rq) || blk_pc_request(rq)) && write) {
/*
* write to drive
*/
if (cdrom_write_check_ireason(drive, len, ireason))
return ide_stopped;
} else if (blk_fs_request(rq) || blk_pc_request(rq)) {
/*
* read from drive
*/
if (cdrom_read_check_ireason(drive, len, ireason))
if (blk_fs_request(rq) || blk_pc_request(rq)) {
if (ide_cd_check_ireason(drive, len, ireason, write))
return ide_stopped;
if (blk_fs_request(rq)) {
if (blk_fs_request(rq) && write == 0) {
int nskip;
if (ide_cd_check_transfer_size(drive, len)) {