1 files changed, 11 insertions, 5 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 89fd0e9ed746..fd332612d64a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3373,14 +3373,20 @@ void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline)
          * to clear 0xff after reset.  For example, HHD424020F7SV00
          * iVDR needs >= 800ms while.  Quantum GoVault needs even more
          * than that.
+         *
+         * Note that some PATA controllers (pata_ali) explode if
+         * status register is read more than once when there's no
+         * device attached.
          */
-        while (1) {
-                u8 status = ata_chk_status(ap);
+        if (ap->flags & ATA_FLAG_SATA) {
+                while (1) {
+                        u8 status = ata_chk_status(ap);
 
-                if (status != 0xff || time_after(jiffies, deadline))
-                        return;
+                        if (status != 0xff || time_after(jiffies, deadline))
+                                return;
 
-                msleep(50);
+                        msleep(50);
+                }
         }
 }