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Commit 03e83cbd authored by Tejun Heo's avatar Tejun Heo
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Revert "AHCI: Do not acquire ata_host::lock from single IRQ handler" 



This reverts commit 33fb0d01.

18dcf433 ("AHCI: Optimize single IRQ interrupt processing") is
scheduled to be reverted.  This is an optimization dependent on the
mentioned commit.  Revert it first.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent aa1cf258

drivers/ata/libahci.c

+4 −0
Original line number Diff line number Diff line
@@ -1875,6 +1875,8 @@ 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;
@@ -1906,6 +1908,8 @@ 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;