1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
index 0b47ca139079..46d203ce60cc 100644
--- a/drivers/ide/ide-xfer-mode.c
+++ b/drivers/ide/ide-xfer-mode.c
@@ -109,6 +109,12 @@ EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 
 int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)
 {
+        /*
+         * IORDY may lead to controller lock up on certain controllers
+         * if the port is not occupied.
+         */
+        if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING))
+                return 0;
         return ata_id_pio_need_iordy(drive->id, pio);
 }
 EXPORT_SYMBOL_GPL(ide_pio_need_iordy);