sdio: set the functions' block size
Before a driver is probed, set the function's block size to the default so the
driver is sure the block size is something sensible and it needn't explicitly
set it.
The default block size is the largest that's supported by both the card and
the host, with a maximum of 512 to ensure aribitrarily sized transfer use the
optimal (least) number of commands.
See http://lkml.org/lkml/2007/8/7/150 for reasons for the block size choice.
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index d229020..fcb13fb 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -128,11 +128,20 @@
struct sdio_driver *drv = to_sdio_driver(dev->driver);
struct sdio_func *func = dev_to_sdio_func(dev);
const struct sdio_device_id *id;
+ int ret;
id = sdio_match_device(func, drv);
if (!id)
return -ENODEV;
+ /* Set the default block size so the driver is sure it's something
+ * sensible. */
+ sdio_claim_host(func);
+ ret = sdio_set_block_size(func, 0);
+ sdio_release_host(func);
+ if (ret)
+ return ret;
+
return drv->probe(func, id);
}