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Subject[PATCH 16/18] 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: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-atapi.c | 17 ++++++++++++++---
drivers/ide/ide-iops.c | 13 +++++++++++++
2 files changed, 27 insertions(+), 3 deletions(-)

Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -183,16 +183,27 @@ cmd_finished:
}
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_driv
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);


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