Commit 850c211c authored Nov 22, 2006 by Ulrich Kunitz Committed by Jeff Garzik Dec 02, 2006

[PATCH] zd1211rw: Optimized handling of zero length entries in length info



There are a high number of split USB transactions, which contain
only one packet but have a length info field. This patch optimizes
this code by stopping parsing the length info structure if a zero
length field is encountered.

Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent 741fec53

drivers/net/wireless/zd1211rw/zd_usb.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -593,6 +593,8 @@ static void handle_rx_packet(struct zd_usb usb, const u8 buffer,
		unsigned int l, k, n;
		for (i = 0, l = 0;; i++) {
		k = le16_to_cpu(get_unaligned(&length_info->length[i]));
		if (k == 0)
		return;
		n = l+k;
		if (n > length)
		return;