Commit 10c2b5ae authored by Johannes Berg's avatar Johannes Berg Committed by Richard Weinberger
Browse files

um: virtio: fix handling of messages without payload 



If we have a message without payload, we call full_read() with
len set to 0, which causes it to return -ECONNRESET. Catch this
case and explicitly return 0 for it so we can actually use the
zero-size config-changed message.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 74e919d2

arch/um/drivers/virtio_uml.c

+3 −0
Original line number Diff line number Diff line
@@ -97,6 +97,9 @@ static int full_read(int fd, void *buf, int len, bool abortable) 
{

	int rc;



	if (!len)

		return 0;



	do {

		rc = os_read_file(fd, buf, len);

		if (rc > 0) {