1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6a2083a6d175..479f95a5c0a3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2333,6 +2333,10 @@ static int ata_dev_set_mode(struct ata_device *dev)
                 dev->flags |= ATA_DFLAG_PIO;
 
         err_mask = ata_dev_set_xfermode(dev);
+        /* Old CFA may refuse this command, which is just fine */
+        if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
+                err_mask &= ~AC_ERR_DEV;
+
         if (err_mask) {
                 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
                                "(err_mask=0x%x)\n", err_mask);