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path: root/drivers/ide/ide-xfer-mode.c
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Diffstat (limited to 'drivers/ide/ide-xfer-mode.c')
-rw-r--r--drivers/ide/ide-xfer-mode.c6
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);