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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-01-25 22:17:08 +01:00
parent d26805fd02
commit 7b5da4be37
1 changed files with 2 additions and 11 deletions
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13
drivers/ide/ide-probe.c
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@ -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 */