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>

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)
 {