sata_via: apply magic FIFO fix to vt6420 too

commit b1353e4f40f6179ab26a3bb1b2e1fe29ffe534f5 upstream.

vt6420 has the same FIFO overflow problem as vt6421 when combined with
certain devices.  This patch applies the magic fix to vt6420 too.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Martin Qvist <q@maq.dk>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Joseph Chan <JosephChan@via.com.tw>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 4730c42a5ee58c54a295dc6a72e493f7b91cd411..c51b8d25cfa84073a204882542355c3dee8b3586 100644 (file)
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -538,7 +538,7 @@ static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
        return 0;
 }
 
-static void svia_configure(struct pci_dev *pdev)
+static void svia_configure(struct pci_dev *pdev, int board_id)
 {
        u8 tmp8;
 
@@ -577,7 +577,7 @@ static void svia_configure(struct pci_dev *pdev)
        }
 
        /*
-        * vt6421 has problems talking to some drives.  The following
+        * vt6420/1 has problems talking to some drives.  The following
         * is the fix from Joseph Chan <JosephChan@via.com.tw>.
         *
         * When host issues HOLD, device may send up to 20DW of data
@@ -596,8 +596,9 @@ static void svia_configure(struct pci_dev *pdev)
         *
         * https://bugzilla.kernel.org/show_bug.cgi?id=15173
         * http://article.gmane.org/gmane.linux.ide/46352
+        * http://thread.gmane.org/gmane.linux.kernel/1062139
         */
-       if (pdev->device == 0x3249) {
+       if (board_id == vt6420 || board_id == vt6421) {
                pci_read_config_byte(pdev, 0x52, &tmp8);
                tmp8 |= 1 << 2;
                pci_write_config_byte(pdev, 0x52, tmp8);
@@ -652,7 +653,7 @@ static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (rc)
                return rc;
 
-       svia_configure(pdev);
+       svia_configure(pdev, board_id);
 
        pci_set_master(pdev);
        return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,