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Commit 88a72109 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide: add ide_read_ireason() helper 



Add ide_read_ireason() helper and use instead of ->INB for reading
ATAPI Interrupt Reason register.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 1f2efb82

drivers/ide/ide-atapi.c

+14 −3
Original line number Diff line number Diff line
@@ -183,16 +183,27 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc, 
}

EXPORT_SYMBOL_GPL(ide_pc_intr);



static u8 ide_read_ireason(ide_drive_t *drive)

{

	ide_task_t task;



	memset(&task, 0, sizeof(task));

	task.tf_flags = IDE_TFLAG_IN_NSECT;



	drive->hwif->tf_read(drive, &task);



	return task.tf.nsect & 3;

}



static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)

{

	ide_hwif_t *hwif = drive->hwif;

	int retries = 100;



	while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {

		printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "

				"a packet command, retrying\n", drive->name);

		udelay(100);

		ireason = hwif->INB(hwif->io_ports.nsect_addr);

		ireason = ide_read_ireason(drive);

		if (retries == 0) {

			printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "

					"a packet command, ignoring\n",
@@ -219,7 +230,7 @@ ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, 
		return startstop;

	}



	ireason = hwif->INB(hwif->io_ports.nsect_addr);

	ireason = ide_read_ireason(drive);

	if (drive->media == ide_tape && !drive->scsi)

		ireason = ide_wait_ireason(drive, ireason);