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authorUlrich Kunitz <kune@deine-taler.de>2006-11-22 00:06:19 +0000
committerJeff Garzik <jeff@garzik.org>2006-12-02 00:12:05 -0500
commit850c211ce6948bcd71e505be22b7ead99a425bfa (patch)
tree6d822061488bbfdf1763f0bb4ce347d083813770 /drivers
parent741fec53f268b691b869ffc70023319406e0cc97 (diff)
[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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_usb.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index c3449cfae7e..aa782e88754 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -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;