ata: pmp: add quirk for Marvell 4140 SATA PMP

commit 945b47441d83d2392ac9f984e0267ad521f24268 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 7ccc084bf1dfb8f7b979f5e7ae777e030303d1b8..85aa76116a305eb50d77f2544c87f09914998bed 100644 (file)
--- 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;
+               }
        }
 }