Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2a3917a8 authored by Tejun Heo's avatar Tejun Heo
Browse files

[PATCH] ahci: add PIOS interim interrupt handling 



During multiblock PIO, multiple PIOS interrupts are generated before
qc compltion.  Current code prints unnecessary message for such cases.
This is exposed when new EH slows down attached device into PIO mode.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
parent 78cd52d0

drivers/scsi/ahci.c

+12 −1
Original line number Diff line number Diff line
@@ -883,7 +883,18 @@ static void ahci_host_intr(struct ata_port *ap) 
		}

	}



	/* spurious interrupt */

	/* hmmm... a spurious interupt */



	/* ignore interim PIO setup fis interrupts */

	if (ata_tag_valid(ap->active_tag)) {

		struct ata_queued_cmd *qc =

			ata_qc_from_tag(ap, ap->active_tag);



		if (qc && qc->tf.protocol == ATA_PROT_PIO &&

		    (status & PORT_IRQ_PIOS_FIS))

			return;

	}



	if (ata_ratelimit())

		ata_port_printk(ap, KERN_INFO, "spurious interrupt "

				"(irq_stat 0x%x active_tag %d)\n",