From: Mark Cave-Ayland <[email protected]> All of the rtlwifi drivers have an error in the routine that tests if the data is "special". If it is, the subsequant transmission will be at the lowest rate to enhance reliability. The 16-bit quantity is big-endian, but was being extracted in native CPU mode. One of the effects of this bug is to inhibit association under some conditions as the TX rate is too high.
A statement that would have made the code correct had been changed to a comment. Rather than just reinstating that code, the fix here passes sparse tests. A side effect of fixing this problem would have been to force all IPv6 frames to run at the lowest rate. The test for that frame type is removed. The original code only checked the lower-order byte of UDP ports for BOOTP protocol. That is extended to the full 16-bit source and destination ports. One of the local headers contained duplicates of some of the ETH_P_XXX definitions. These are deleted. Signed-off-by: Larry Finger <[email protected]> Cc: Mark Cave-Ayland <[email protected]> Cc: Stable <[email protected]> [2.6.38+] --- V2 - Addresses comments by Ben Hutchings and Bjorn Mork. drivers/net/wireless/rtlwifi/base.c | 15 ++++++--------- drivers/net/wireless/rtlwifi/wifi.h | 6 +----- 2 files changed, 7 insertions(+), 14 deletions(-) Index: wireless-testing-save/drivers/net/wireless/rtlwifi/base.c =================================================================== --- wireless-testing-save.orig/drivers/net/wireless/rtlwifi/base.c +++ wireless-testing-save/drivers/net/wireless/rtlwifi/base.c @@ -1077,17 +1077,17 @@ u8 rtl_is_special_data(struct ieee80211_ ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len + SNAP_SIZE + PROTOC_TYPE_SIZE); - ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE); - /* ether_type = ntohs(ether_type); */ + ether_type = be16_to_cpu(*(__be16 *)((u8 *)skb->data + mac_hdr_len + + SNAP_SIZE)); if (ETH_P_IP == ether_type) { if (IPPROTO_UDP == ip->protocol) { struct udphdr *udp = (struct udphdr *)((u8 *) ip + (ip->ihl << 2)); - if (((((u8 *) udp)[1] == 68) && - (((u8 *) udp)[3] == 67)) || - ((((u8 *) udp)[1] == 67) && - (((u8 *) udp)[3] == 68))) { + if (((((u16 *) udp)[0] == 68) && + (((u16 *) udp)[2] == 67)) || + ((((u16 *) udp)[0] == 67) && + (((u16 *) udp)[2] == 68))) { /* * 68 : UDP BOOTP client * 67 : UDP BOOTP server @@ -1126,9 +1126,6 @@ u8 rtl_is_special_data(struct ieee80211_ } return true; - } else if (ETH_P_IPV6 == ether_type) { - /* IPv6 */ - return true; } return false; Index: wireless-testing-save/drivers/net/wireless/rtlwifi/wifi.h =================================================================== --- wireless-testing-save.orig/drivers/net/wireless/rtlwifi/wifi.h +++ wireless-testing-save/drivers/net/wireless/rtlwifi/wifi.h @@ -77,11 +77,7 @@ #define RTL_SLOT_TIME_9 9 #define RTL_SLOT_TIME_20 20 -/*related with tcp/ip. */ -/*if_ehther.h*/ -#define ETH_P_PAE 0x888E /*Port Access Entity (IEEE 802.1X) */ -#define ETH_P_IP 0x0800 /*Internet Protocol packet */ -#define ETH_P_ARP 0x0806 /*Address Resolution packet */ +/*related to tcp/ip. */ #define SNAP_SIZE 6 #define PROTOC_TYPE_SIZE 2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
