greybus: manifest: Account for padding in string descriptor

String descriptors are padded towards the end to align them to 4 byte
boundaries. Take that into account while calculating expected size.

Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/manifest.c b/drivers/staging/greybus/manifest.c
index d6cafeb..1253663 100644 (file)
--- a/drivers/staging/greybus/manifest.c
+++ b/drivers/staging/greybus/manifest.c
@@ -100,6 +100,9 @@ static int identify_descriptor(struct gb_interface *intf,
        case GREYBUS_TYPE_STRING:
                expected_size += sizeof(struct greybus_descriptor_string);
                expected_size += desc->string.length;
+
+               /* String descriptors are padded to 4 byte boundaries */
+               expected_size = ALIGN(expected_size, 4);
                break;
        case GREYBUS_TYPE_INTERFACE:
                expected_size += sizeof(struct greybus_descriptor_interface);