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Commit 64814f23 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide-cd: factor out transfer size checking from cdrom_read_intr() 



This is a preparation for cdrom_read_intr() and cdrom_write_intr() merge.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent b4ab726c

drivers/ide/ide-cd.c

+26 −12
Original line number Diff line number Diff line
@@ -713,6 +713,31 @@ int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason) 
	return -1;

}



/*

 * Assume that the drive will always provide data in multiples of at least

 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.

 */

static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)

{

	struct cdrom_info *cd = drive->driver_data;



	if ((len % SECTOR_SIZE) == 0)

		return 0;



	printk(KERN_ERR "%s: %s: Bad transfer size %d\n",

			drive->name, __FUNCTION__, len);



	if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)

		printk(KERN_ERR "  This drive is not supported by "

				"this version of the driver\n");

	else {

		printk(KERN_ERR "  Trying to limit transfer sizes\n");

		cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;

	}



	return 1;

}



/*

 * Interrupt routine.  Called when a read request has completed.

 */
@@ -774,18 +799,7 @@ static ide_startstop_t cdrom_read_intr (ide_drive_t *drive) 
	if (cdrom_read_check_ireason (drive, len, ireason))

		return ide_stopped;



	/* Assume that the drive will always provide data in multiples

	   of at least SECTOR_SIZE, as it gets hairy to keep track

	   of the transfers otherwise. */

	if ((len % SECTOR_SIZE) != 0) {

		printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",

			drive->name, len);

		if (info->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)

			printk (KERN_ERR "  This drive is not supported by this version of the driver\n");

		else {

			printk (KERN_ERR "  Trying to limit transfer sizes\n");

			info->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;

		}

	if (ide_cd_check_transfer_size(drive, len)) {

		cdrom_end_request(drive, 0);

		return ide_stopped;

	}