mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
![Yogesh Ashok Powar](/assets/img/avatar_default.png)
Following three warnings are fixed: >init.c +256 mwifiex_init_adapter(71) >warn: variable dereferenced before check 'adapter->sleep_cfm' >(see line 191) >sta_rx.c +193 mwifiex_process_sta_rx_packet(75) >warn: variable dereferenced before check 'priv' (see line 182) Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
202 lines
6.3 KiB
C
202 lines
6.3 KiB
C
/*
|
|
* Marvell Wireless LAN device driver: station RX data handling
|
|
*
|
|
* Copyright (C) 2011, Marvell International Ltd.
|
|
*
|
|
* This software file (the "File") is distributed by Marvell International
|
|
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
|
|
* (the "License"). You may use, redistribute and/or modify this File in
|
|
* accordance with the terms and conditions of the License, a copy of which
|
|
* is available by writing to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
|
|
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
|
|
*
|
|
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
|
|
* this warranty disclaimer.
|
|
*/
|
|
|
|
#include "decl.h"
|
|
#include "ioctl.h"
|
|
#include "util.h"
|
|
#include "fw.h"
|
|
#include "main.h"
|
|
#include "11n_aggr.h"
|
|
#include "11n_rxreorder.h"
|
|
|
|
/*
|
|
* This function processes the received packet and forwards it
|
|
* to kernel/upper layer.
|
|
*
|
|
* This function parses through the received packet and determines
|
|
* if it is a debug packet or normal packet.
|
|
*
|
|
* For non-debug packets, the function chops off unnecessary leading
|
|
* header bytes, reconstructs the packet as an ethernet frame or
|
|
* 802.2/llc/snap frame as required, and sends it to kernel/upper layer.
|
|
*
|
|
* The completion callback is called after processing in complete.
|
|
*/
|
|
int mwifiex_process_rx_packet(struct mwifiex_adapter *adapter,
|
|
struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
|
|
struct mwifiex_private *priv = adapter->priv[rx_info->bss_index];
|
|
struct rx_packet_hdr *rx_pkt_hdr;
|
|
struct rxpd *local_rx_pd;
|
|
int hdr_chop;
|
|
struct ethhdr *eth_hdr;
|
|
u8 rfc1042_eth_hdr[ETH_ALEN] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
|
|
|
|
local_rx_pd = (struct rxpd *) (skb->data);
|
|
|
|
rx_pkt_hdr = (struct rx_packet_hdr *) ((u8 *) local_rx_pd +
|
|
local_rx_pd->rx_pkt_offset);
|
|
|
|
if (!memcmp(&rx_pkt_hdr->rfc1042_hdr,
|
|
rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr))) {
|
|
/*
|
|
* Replace the 803 header and rfc1042 header (llc/snap) with an
|
|
* EthernetII header, keep the src/dst and snap_type
|
|
* (ethertype).
|
|
* The firmware only passes up SNAP frames converting
|
|
* all RX Data from 802.11 to 802.2/LLC/SNAP frames.
|
|
* To create the Ethernet II, just move the src, dst address
|
|
* right before the snap_type.
|
|
*/
|
|
eth_hdr = (struct ethhdr *)
|
|
((u8 *) &rx_pkt_hdr->eth803_hdr
|
|
+ sizeof(rx_pkt_hdr->eth803_hdr) +
|
|
sizeof(rx_pkt_hdr->rfc1042_hdr)
|
|
- sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
|
|
- sizeof(rx_pkt_hdr->eth803_hdr.h_source)
|
|
- sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
|
|
|
|
memcpy(eth_hdr->h_source, rx_pkt_hdr->eth803_hdr.h_source,
|
|
sizeof(eth_hdr->h_source));
|
|
memcpy(eth_hdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
|
|
sizeof(eth_hdr->h_dest));
|
|
|
|
/* Chop off the rxpd + the excess memory from the 802.2/llc/snap
|
|
header that was removed. */
|
|
hdr_chop = (u8 *) eth_hdr - (u8 *) local_rx_pd;
|
|
} else {
|
|
/* Chop off the rxpd */
|
|
hdr_chop = (u8 *) &rx_pkt_hdr->eth803_hdr -
|
|
(u8 *) local_rx_pd;
|
|
}
|
|
|
|
/* Chop off the leading header bytes so the it points to the start of
|
|
either the reconstructed EthII frame or the 802.2/llc/snap frame */
|
|
skb_pull(skb, hdr_chop);
|
|
|
|
priv->rxpd_rate = local_rx_pd->rx_rate;
|
|
|
|
priv->rxpd_htinfo = local_rx_pd->ht_info;
|
|
|
|
ret = mwifiex_recv_packet(adapter, skb);
|
|
if (ret == -1)
|
|
dev_err(adapter->dev, "recv packet failed\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This function processes the received buffer.
|
|
*
|
|
* The function looks into the RxPD and performs sanity tests on the
|
|
* received buffer to ensure its a valid packet, before processing it
|
|
* further. If the packet is determined to be aggregated, it is
|
|
* de-aggregated accordingly. Non-unicast packets are sent directly to
|
|
* the kernel/upper layers. Unicast packets are handed over to the
|
|
* Rx reordering routine if 11n is enabled.
|
|
*
|
|
* The completion callback is called after processing in complete.
|
|
*/
|
|
int mwifiex_process_sta_rx_packet(struct mwifiex_adapter *adapter,
|
|
struct sk_buff *skb)
|
|
{
|
|
int ret = 0;
|
|
struct rxpd *local_rx_pd;
|
|
struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
|
|
struct rx_packet_hdr *rx_pkt_hdr;
|
|
u8 ta[ETH_ALEN];
|
|
u16 rx_pkt_type;
|
|
struct mwifiex_private *priv = adapter->priv[rx_info->bss_index];
|
|
|
|
if (!priv)
|
|
return -1;
|
|
|
|
local_rx_pd = (struct rxpd *) (skb->data);
|
|
rx_pkt_type = local_rx_pd->rx_pkt_type;
|
|
|
|
rx_pkt_hdr = (struct rx_packet_hdr *) ((u8 *) local_rx_pd +
|
|
local_rx_pd->rx_pkt_offset);
|
|
|
|
if ((local_rx_pd->rx_pkt_offset + local_rx_pd->rx_pkt_length) >
|
|
(u16) skb->len) {
|
|
dev_err(adapter->dev, "wrong rx packet: len=%d,"
|
|
" rx_pkt_offset=%d, rx_pkt_length=%d\n", skb->len,
|
|
local_rx_pd->rx_pkt_offset, local_rx_pd->rx_pkt_length);
|
|
priv->stats.rx_dropped++;
|
|
dev_kfree_skb_any(skb);
|
|
return ret;
|
|
}
|
|
|
|
if (local_rx_pd->rx_pkt_type == PKT_TYPE_AMSDU) {
|
|
struct sk_buff_head list;
|
|
struct sk_buff *rx_skb;
|
|
|
|
__skb_queue_head_init(&list);
|
|
|
|
skb_pull(skb, local_rx_pd->rx_pkt_offset);
|
|
skb_trim(skb, local_rx_pd->rx_pkt_length);
|
|
|
|
ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr,
|
|
priv->wdev->iftype, 0, false);
|
|
|
|
while (!skb_queue_empty(&list)) {
|
|
rx_skb = __skb_dequeue(&list);
|
|
ret = mwifiex_recv_packet(adapter, rx_skb);
|
|
if (ret == -1)
|
|
dev_err(adapter->dev, "Rx of A-MSDU failed");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If the packet is not an unicast packet then send the packet
|
|
* directly to os. Don't pass thru rx reordering
|
|
*/
|
|
if (!IS_11N_ENABLED(priv) ||
|
|
memcmp(priv->curr_addr, rx_pkt_hdr->eth803_hdr.h_dest, ETH_ALEN)) {
|
|
mwifiex_process_rx_packet(adapter, skb);
|
|
return ret;
|
|
}
|
|
|
|
if (mwifiex_queuing_ra_based(priv)) {
|
|
memcpy(ta, rx_pkt_hdr->eth803_hdr.h_source, ETH_ALEN);
|
|
} else {
|
|
if (rx_pkt_type != PKT_TYPE_BAR)
|
|
priv->rx_seq[local_rx_pd->priority] =
|
|
local_rx_pd->seq_num;
|
|
memcpy(ta, priv->curr_bss_params.bss_descriptor.mac_address,
|
|
ETH_ALEN);
|
|
}
|
|
|
|
/* Reorder and send to OS */
|
|
ret = mwifiex_11n_rx_reorder_pkt(priv, local_rx_pd->seq_num,
|
|
local_rx_pd->priority, ta,
|
|
(u8) local_rx_pd->rx_pkt_type,
|
|
skb);
|
|
|
|
if (ret || (rx_pkt_type == PKT_TYPE_BAR))
|
|
dev_kfree_skb_any(skb);
|
|
|
|
if (ret)
|
|
priv->stats.rx_dropped++;
|
|
|
|
return ret;
|
|
}
|