X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=drivers%2Fata%2Flibahci.c;h=7461a587b39b4e9d953e3a0063b9f1fb8cad0319;hb=0516900adfa1955f91f1c310f9a2fa857949de1c;hp=71b07198e207d2577a8e52fe736f91f54b39a226;hpb=0efacbbaee1e94e9942da0912f5b46ffd45a74bd;p=deliverable%2Flinux.git

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 71b07198e207..7461a587b39b 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1975,7 +1975,7 @@ unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
 	 */
 	pp->active_link = qc->dev->link;
 
-	if (qc->tf.protocol == ATA_PROT_NCQ)
+	if (ata_is_ncq(qc->tf.protocol))
 		writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
 
 	if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
@@ -2392,12 +2392,20 @@ static int ahci_port_start(struct ata_port *ap)
 static void ahci_port_stop(struct ata_port *ap)
 {
 	const char *emsg = NULL;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
+	void __iomem *host_mmio = hpriv->mmio;
 	int rc;
 
 	/* de-initialize port */
 	rc = ahci_deinit_port(ap, &emsg);
 	if (rc)
 		ata_port_warn(ap, "%s (%d)\n", emsg, rc);
+
+	/*
+	 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
+	 * re-enabling INTx.
+	 */
+	writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
 }
 
 void ahci_print_info(struct ata_host *host, const char *scc_s)