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| author | Ulrich Kunitz <kune@deine-taler.de> | 2006-11-22 00:06:19 +0000 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-12-02 00:12:05 -0500 |
| commit | 850c211ce6948bcd71e505be22b7ead99a425bfa (patch) | |
| tree | 6d822061488bbfdf1763f0bb4ce347d083813770 /drivers | |
| parent | 741fec53f268b691b869ffc70023319406e0cc97 (diff) | |
| download | linux-3.10-850c211ce6948bcd71e505be22b7ead99a425bfa.tar.gz linux-3.10-850c211ce6948bcd71e505be22b7ead99a425bfa.tar.bz2 linux-3.10-850c211ce6948bcd71e505be22b7ead99a425bfa.zip | |
[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.c | 2 |
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; |