Commit 5d295bc3 authored by David Kershner's avatar David Kershner Committed by Greg Kroah-Hartman
Browse files

staging: unisys: visorbus: return EAGAIN when empty 



It really isn't an error when you call visorchannel_signalremove and
there isn't anything in the queue. Just means that the IOSP didn't
process anything since the last time you checked. Just inform the
caller that it is empty by returning -EAGAIN.

Signed-off-by: default avatarDavid Kershner <david.kershner@unisys.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 29b27809

drivers/staging/unisys/visorbus/visorchannel.c

+2 −1
Original line number Diff line number Diff line
@@ -237,8 +237,9 @@ signalremove_inner(struct visorchannel *channel, u32 queue, void *msg) 
	if (error)

		return error;



	/* No signals to remove; have caller try again. */

	if (sig_hdr.head == sig_hdr.tail)

		return -EIO;	/* no signals to remove */

		return -EAGAIN;



	sig_hdr.tail = (sig_hdr.tail + 1) % sig_hdr.max_slots;