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OpenCloudOS-Kernel
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ide: don't enable/disable interrupts in force threaded-IRQ mode 

The interrupts are enabled/disabled so the interrupt handler can run
with enabled interrupts while serving the interrupt and not lose other
interrupts especially the timer tick.
If the system runs with force-threaded interrupts then there is no need
to enable the interrupts.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sebastian Andrzej Siewior 2018-05-04 16:24:46 +02:00 committed by David S. Miller
parent ce1e518190
commit 47b82e8818
3 changed files with 11 additions and 5 deletions
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13
drivers/ide/ide-iops.c
View File

@ -108,6 +108,7 @@ int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
ide_hwif_t *hwif = drive->hwif;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
unsigned long flags;
bool irqs_threaded = force_irqthreads;
int i;
u8 stat;
@ -115,8 +116,10 @@ int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
stat = tp_ops->read_status(hwif);
if (stat & ATA_BUSY) {
local_save_flags(flags);
local_irq_enable_in_hardirq();
if (!irqs_threaded) {
local_save_flags(flags);
local_irq_enable_in_hardirq();
}
timeout += jiffies;
while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
if (time_after(jiffies, timeout)) {
@ -129,12 +132,14 @@ int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
if ((stat & ATA_BUSY) == 0)
break;
local_irq_restore(flags);
if (!irqs_threaded)
local_irq_restore(flags);
*rstat = stat;
return -EBUSY;
}
}
local_irq_restore(flags);
if (!irqs_threaded)
local_irq_restore(flags);
}
/*
* Allow status to settle, then read it again.

2
drivers/ide/ide-taskfile.c
View File

@ -405,7 +405,7 @@ static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
return startstop;
}
if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
local_irq_disable();
ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);

1
kernel/irq/manage.c
View File

@ -24,6 +24,7 @@
#ifdef CONFIG_IRQ_FORCED_THREADING
__read_mostly bool force_irqthreads;
EXPORT_SYMBOL_GPL(force_irqthreads);
static int __init setup_forced_irqthreads(char *arg)
{