ata: pmp: add quirk for Marvell 4140 SATA PMP

This commit adds the necessary quirk to make the Marvell 4140 SATA PMP
work properly. This PMP doesn't like SRST on port number 4 (the host
port) so this commit marks this port as not supporting SRST.

Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 7ccc084bf1df..85aa76116a30 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -460,6 +460,13 @@ static void sata_pmp_quirks(struct ata_port *ap)
                                        ATA_LFLAG_NO_SRST |
                                        ATA_LFLAG_ASSUME_ATA;
                 }
+        } else if (vendor == 0x11ab && devid == 0x4140) {
+                /* Marvell 4140 quirks */
+                ata_for_each_link(link, ap, EDGE) {
+                        /* port 4 is for SEMB device and it doesn't like SRST */
+                        if (link->pmp == 4)
+                                link->flags |= ATA_LFLAG_DISABLED;
+                }
         }
 }