1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 27a110110077..8ee6b5b4ede7 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -899,14 +899,25 @@ static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc)
 
 static void sil24_pmp_attach(struct ata_port *ap)
 {
+        u32 *gscr = ap->link.device->gscr;
+
         sil24_config_pmp(ap, 1);
         sil24_init_port(ap);
+
+        if (sata_pmp_gscr_vendor(gscr) == 0x11ab &&
+            sata_pmp_gscr_devid(gscr) == 0x4140) {
+                ata_port_printk(ap, KERN_INFO,
+                        "disabling NCQ support due to sil24-mv4140 quirk\n");
+                ap->flags &= ~ATA_FLAG_NCQ;
+        }
 }
 
 static void sil24_pmp_detach(struct ata_port *ap)
 {
         sil24_init_port(ap);
         sil24_config_pmp(ap, 0);
+
+        ap->flags |= ATA_FLAG_NCQ;
 }
 
 static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,