Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=18a056feccabdfa9764016a615121b194828bc72
Commit: 18a056feccabdfa9764016a615121b194828bc72
Parent: 852738f39258deafb3d89c187cb1a4050820d555
Author: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
AuthorDate: Sat Jan 26 20:13:12 2008 +0100
Committer: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
CommitDate: Sat Jan 26 20:13:12 2008 +0100
ide: don't enable local IRQs for PIO-in in driver_cmd_intr() (take 2)
Don't enable local IRQs for PIO-in protocol in driver_cmd_intr().
While at it:
* Remove redundant rq->cmd_type check.
* Read status register after enabling local IRQs for no-data protocol.
v2:
* Re-add DRQ=1 check lost in v1 (noticed by Sergei).
Acked-by: Sergei Shtylyov <[EMAIL PROTECTED]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
---
drivers/ide/ide-io.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 8c98904..dc6af24 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -638,19 +638,22 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
ide_hwif_t *hwif = HWIF(drive);
- u8 *args = (u8 *) rq->buffer;
- u8 stat = hwif->INB(IDE_STATUS_REG);
+ u8 *args = (u8 *)rq->buffer, pio_in = (args && args[3]) ? 1 : 0, stat;
- local_irq_enable_in_hardirq();
- if (rq->cmd_type == REQ_TYPE_ATA_CMD &&
- (stat & DRQ_STAT) && args && args[3]) {
+ if (pio_in) {
u8 io_32bit = drive->io_32bit;
+ stat = hwif->INB(IDE_STATUS_REG);
+ if ((stat & DRQ_STAT) == 0)
+ goto out;
drive->io_32bit = 0;
hwif->ata_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
drive->io_32bit = io_32bit;
stat = wait_drive_not_busy(drive);
+ } else {
+ local_irq_enable_in_hardirq();
+ stat = hwif->INB(IDE_STATUS_REG);
}
-
+out:
if (!OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_error(drive, "drive_cmd", stat);
/* calls ide_end_drive_cmd */
-
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