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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-01-25 22:17:08 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-01-25 22:17:08 +0100
commit7b5da4be3718c6b4cd771fb82e3e481b04790f0e (patch)
treef3b0cb74ae90d64e80bb1ea29ef29d1a13745e2d /drivers
parentd26805fd025abe1ab8785b23a7942cfb6ceffd75 (diff)
ide: remove IRQF_DISABLED from IRQ flags for IDE IRQ handler
IRQF_DISABLED is not needed because the first thing that ide_intr() (IDE IRQ handler) does is calling spin_lock_irqsave() which disables local IRQs (IRQ unmasking is later handled by drive->unmask). kernel/irq/handle.c: irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) ... if (!(action->flags & IRQF_DISABLED)) local_irq_enable_in_hardirq(); do { ret = action->handler(irq, action->dev_id); if (ret == IRQ_HANDLED) status |= action->flags; retval |= ret; action = action->next; } while (action); ... drivers/ide/ide-io.c: irqreturn_t ide_intr (int irq, void *dev_id) ... spin_lock_irqsave(&ide_lock, flags); ... spin_unlock(&ide_lock); ... if (drive->unmask) local_irq_enable_in_hardirq(); ... Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/ide-probe.c13
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 0cb3d2bb3ab..0dda7ac0d95 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -968,11 +968,6 @@ static int ide_init_queue(ide_drive_t *drive)
* Much of the code is for correctly detecting/handling irq sharing
* and irq serialization situations. This is somewhat complex because
* it handles static as well as dynamic (PCMCIA) IDE interfaces.
- *
- * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with
- * interrupts completely disabled. This can be bad for interrupt latency,
- * but anything else has led to problems on some machines. We re-enable
- * interrupts as much as we can safely do in most places.
*/
static int init_irq (ide_hwif_t *hwif)
{
@@ -1055,17 +1050,13 @@ static int init_irq (ide_hwif_t *hwif)
* Allocate the irq, if not already obtained for another hwif
*/
if (!match || match->irq != hwif->irq) {
- int sa = IRQF_DISABLED;
+ int sa = 0;
#if defined(__mc68000__) || defined(CONFIG_APUS)
sa = IRQF_SHARED;
#endif /* __mc68000__ || CONFIG_APUS */
- if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
+ if (IDE_CHIPSET_IS_PCI(hwif->chipset))
sa = IRQF_SHARED;
-#ifndef CONFIG_IDEPCI_SHARE_IRQ
- sa |= IRQF_DISABLED;
-#endif /* CONFIG_IDEPCI_SHARE_IRQ */
- }
if (hwif->io_ports[IDE_CONTROL_OFFSET])
/* clear nIEN */