1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 77aa8d7ecec4..e6946fc527d0 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -846,6 +846,17 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc)
         if (!ata_is_atapi(qc->tf.protocol)) {
                 prb = &cb->ata.prb;
                 sge = cb->ata.sge;
+                if (ata_is_data(qc->tf.protocol)) {
+                        u16 prot = 0;
+                        ctrl = PRB_CTRL_PROTOCOL;
+                        if (ata_is_ncq(qc->tf.protocol))
+                                prot |= PRB_PROT_NCQ;
+                        if (qc->tf.flags & ATA_TFLAG_WRITE)
+                                prot |= PRB_PROT_WRITE;
+                        else
+                                prot |= PRB_PROT_READ;
+                        prb->prot = cpu_to_le16(prot);
+                }
         } else {
                 prb = &cb->atapi.prb;
                 sge = cb->atapi.sge;