diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-05-04 16:24:46 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-05 16:26:47 -0400 |
| commit | 47b82e88180c3c6db795a43373beab47cb073f7a (patch) | |
| tree | 1ef365d5cbd94830da977107d8f11ebe466610fe | |
| parent | ce1e518190ea71d1ecf1a91a8b0794ba9bd78e89 (diff) | |
| download | linux-47b82e88180c3c6db795a43373beab47cb073f7a.tar.bz2 | |
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>
| -rw-r--r-- | drivers/ide/ide-iops.c | 13 | ||||
| -rw-r--r-- | drivers/ide/ide-taskfile.c | 2 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 1 |
3 files changed, 11 insertions, 5 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index 210a0887dd29..d55e9ebd5628 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -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. diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 14bdab15a454..89b29028d315 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -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); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index e3336d904f64..4c2ef8084e32 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -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) { |