Commit 746e0ef9 authored by Alex Elder's avatar Alex Elder Committed by Greg Kroah-Hartman
Browse files

greybus: use null pointer for empty payload 



Currently message->payload always points to the address immediately
following the header in a message.  If the payload length is 0, this
is not a valid pointer.

Change the code to assign a null pointer to the payload in this
case.  I have verified that no code dereferences the payload pointer
unless the payload is known to have non-zero size.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
parent 7cfa6995

drivers/staging/greybus/operation.c

+1 −1
Original line number Diff line number Diff line
@@ -284,7 +284,7 @@ static void gb_operation_message_init(struct greybus_host_device *hd, 
	header = (struct gb_operation_msg_hdr *)(buffer + hd->buffer_headroom);



	message->header = header;

	message->payload = header + 1;

	message->payload = payload_size ? header + 1 : NULL;

	message->payload_size = payload_size;



	/*