Commit 5db5b021 authored by Shane Huang's avatar Shane Huang Committed by Jeff Garzik

ahci: pp->active_link is not reliable when FBS is enabled

pp->active_link is not reliable when FBS is enabled.
Both PORT_SCR_ACT and PORT_CMD_ISSUE should be checked
because mixed NCQ and non-NCQ commands may be in flight.
Signed-off-by: default avatarShane Huang <shane.huang@amd.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 9deb3431
......@@ -2278,7 +2278,7 @@ static void ahci_port_intr(struct ata_port *ap)
struct ahci_port_priv *pp = ap->private_data;
struct ahci_host_priv *hpriv = ap->host->private_data;
int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
u32 status, qc_active;
u32 status, qc_active = 0;
int rc;
status = readl(port_mmio + PORT_IRQ_STAT);
......@@ -2336,11 +2336,22 @@ static void ahci_port_intr(struct ata_port *ap)
}
}
/* pp->active_link is valid iff any command is in flight */
if (ap->qc_active && pp->active_link->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
qc_active = readl(port_mmio + PORT_CMD_ISSUE);
/* pp->active_link is not reliable once FBS is enabled, both
* PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
* NCQ and non-NCQ commands may be in flight at the same time.
*/
if (pp->fbs_enabled) {
if (ap->qc_active) {
qc_active = readl(port_mmio + PORT_SCR_ACT);
qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
}
} else {
/* pp->active_link is valid iff any command is in flight */
if (ap->qc_active && pp->active_link->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
qc_active = readl(port_mmio + PORT_CMD_ISSUE);
}
rc = ata_qc_complete_multiple(ap, qc_active);
......
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