There is no need to acquire ata_host::lock spinlock from
hardware context single IRQ interrupt handler since the
handler does not access host data that could be altered
by concurrent processors.
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
Cc: linux-ide@xxxxxxxxxxxxxxx
---
drivers/ata/libahci.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 3ce3d23..5eb61c9 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1875,8 +1875,6 @@ static irqreturn_t ahci_single_irq_intr(int irq, void *dev_instance)
irq_masked = irq_stat & hpriv->port_map;
- spin_lock(&host->lock);
-
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap;
@@ -1908,8 +1906,6 @@ static irqreturn_t ahci_single_irq_intr(int irq, void *dev_instance)
*/
writel(irq_stat, mmio + HOST_IRQ_STAT);
- spin_unlock(&host->lock);
-
VPRINTK("EXIT\n");
return handled ? IRQ_WAKE_THREAD : IRQ_NONE;
--
1.8.3.1
--
Regards,
Alexander Gordeev
agordeev@xxxxxxxxxx
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