[PATCH] libata: add per-dev pio/mwdma/udma_mask
Add per-dev pio/mwdma/udma_mask. All transfer mode limits used to be
applied to ap->*_mask which unnecessarily restricted other devices
sharing the port. This change will also benefit later EH speed down
and hotplug.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 7a54244..fbe8ba2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -358,6 +358,11 @@
unsigned int max_sectors; /* per-device max sectors */
unsigned int cdb_len;
+ /* per-dev xfer mask */
+ unsigned int pio_mask;
+ unsigned int mwdma_mask;
+ unsigned int udma_mask;
+
/* for CHS addressing */
u16 cylinders; /* Number of cylinders */
u16 heads; /* Number of heads */