mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 18:20:54 +07:00
[PATCH] zd1211rw: Call ieee80211_rx in tasklet
The driver called ieee80211_rx in hardware interrupt context. This has been against the intention of the ieee80211_rx function. It caused a bug in the crypto routines used by WPA. This patch calls ieee80211_rx in a tasklet. Signed-off-by: Ulrich Kunitz <kune@deine-taler.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ulrich Kunitz
John W. Linville
parent
e25db641c0
commit
4d1feabcbf
@ -41,6 +41,8 @@ static void housekeeping_disable(struct zd_mac *mac);
|
||||
|
||||
static void set_multicast_hash_handler(struct work_struct *work);
|
||||
|
||||
static void do_rx(unsigned long mac_ptr);
|
||||
|
||||
int zd_mac_init(struct zd_mac *mac,
|
||||
struct net_device *netdev,
|
||||
struct usb_interface *intf)
|
||||
@ -53,6 +55,10 @@ int zd_mac_init(struct zd_mac *mac,
|
||||
INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
|
||||
INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work);
|
||||
|
||||
skb_queue_head_init(&mac->rx_queue);
|
||||
tasklet_init(&mac->rx_tasklet, do_rx, (unsigned long)mac);
|
||||
tasklet_disable(&mac->rx_tasklet);
|
||||
|
||||
ieee_init(ieee);
|
||||
softmac_init(ieee80211_priv(netdev));
|
||||
zd_chip_init(&mac->chip, netdev, intf);
|
||||
@ -140,6 +146,8 @@ int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
|
||||
void zd_mac_clear(struct zd_mac *mac)
|
||||
{
|
||||
flush_workqueue(zd_workqueue);
|
||||
skb_queue_purge(&mac->rx_queue);
|
||||
tasklet_kill(&mac->rx_tasklet);
|
||||
zd_chip_clear(&mac->chip);
|
||||
ZD_ASSERT(!spin_is_locked(&mac->lock));
|
||||
ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
|
||||
@ -168,6 +176,8 @@ int zd_mac_open(struct net_device *netdev)
|
||||
struct zd_chip *chip = &mac->chip;
|
||||
int r;
|
||||
|
||||
tasklet_enable(&mac->rx_tasklet);
|
||||
|
||||
r = zd_chip_enable_int(chip);
|
||||
if (r < 0)
|
||||
goto out;
|
||||
@ -218,6 +228,8 @@ int zd_mac_stop(struct net_device *netdev)
|
||||
*/
|
||||
|
||||
zd_chip_disable_rx(chip);
|
||||
skb_queue_purge(&mac->rx_queue);
|
||||
tasklet_disable(&mac->rx_tasklet);
|
||||
housekeeping_disable(mac);
|
||||
ieee80211softmac_stop(netdev);
|
||||
|
||||
@ -470,13 +482,13 @@ static void bssinfo_change(struct net_device *netdev, u32 changes)
|
||||
|
||||
if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
|
||||
/* Set RTS rate to highest available basic rate */
|
||||
u8 rate = ieee80211softmac_highest_supported_rate(softmac,
|
||||
u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
|
||||
&bssinfo->supported_rates, 1);
|
||||
rate = rate_to_zd_rate(rate);
|
||||
hi_rate = rate_to_zd_rate(hi_rate);
|
||||
|
||||
spin_lock_irqsave(&mac->lock, flags);
|
||||
if (rate != mac->rts_rate) {
|
||||
mac->rts_rate = rate;
|
||||
if (hi_rate != mac->rts_rate) {
|
||||
mac->rts_rate = hi_rate;
|
||||
need_set_rts_cts = 1;
|
||||
}
|
||||
spin_unlock_irqrestore(&mac->lock, flags);
|
||||
@ -1072,43 +1084,75 @@ static int fill_rx_stats(struct ieee80211_rx_stats *stats,
|
||||
return 0;
|
||||
}
|
||||
|
||||
int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length)
|
||||
static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
|
||||
{
|
||||
int r;
|
||||
struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
|
||||
struct ieee80211_rx_stats stats;
|
||||
const struct rx_status *status;
|
||||
struct sk_buff *skb;
|
||||
|
||||
if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
|
||||
IEEE80211_FCS_LEN + sizeof(struct rx_status))
|
||||
return -EINVAL;
|
||||
if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
|
||||
IEEE80211_FCS_LEN + sizeof(struct rx_status))
|
||||
{
|
||||
dev_dbg_f(zd_mac_dev(mac), "Packet with length %u to small.\n",
|
||||
skb->len);
|
||||
goto free_skb;
|
||||
}
|
||||
|
||||
r = fill_rx_stats(&stats, &status, mac, buffer, length);
|
||||
if (r)
|
||||
return r;
|
||||
r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
|
||||
if (r) {
|
||||
/* Only packets with rx errors are included here. */
|
||||
goto free_skb;
|
||||
}
|
||||
|
||||
length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+
|
||||
sizeof(struct rx_status);
|
||||
buffer += ZD_PLCP_HEADER_SIZE;
|
||||
__skb_pull(skb, ZD_PLCP_HEADER_SIZE);
|
||||
__skb_trim(skb, skb->len -
|
||||
(IEEE80211_FCS_LEN + sizeof(struct rx_status)));
|
||||
|
||||
update_qual_rssi(mac, buffer, length, stats.signal, stats.rssi);
|
||||
update_qual_rssi(mac, skb->data, skb->len, stats.signal,
|
||||
status->signal_strength);
|
||||
|
||||
r = filter_rx(ieee, buffer, length, &stats);
|
||||
if (r <= 0)
|
||||
return r;
|
||||
r = filter_rx(ieee, skb->data, skb->len, &stats);
|
||||
if (r <= 0) {
|
||||
if (r < 0)
|
||||
dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
|
||||
goto free_skb;
|
||||
}
|
||||
|
||||
skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
|
||||
if (!skb)
|
||||
return -ENOMEM;
|
||||
if (ieee->iw_mode == IW_MODE_MONITOR)
|
||||
fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac,
|
||||
fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
|
||||
&stats, status);
|
||||
memcpy(skb_put(skb, length), buffer, length);
|
||||
|
||||
r = ieee80211_rx(ieee, skb, &stats);
|
||||
if (!r)
|
||||
dev_kfree_skb_any(skb);
|
||||
if (r)
|
||||
return;
|
||||
free_skb:
|
||||
/* We are always in a soft irq. */
|
||||
dev_kfree_skb(skb);
|
||||
}
|
||||
|
||||
static void do_rx(unsigned long mac_ptr)
|
||||
{
|
||||
struct zd_mac *mac = (struct zd_mac *)mac_ptr;
|
||||
struct sk_buff *skb;
|
||||
|
||||
while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
|
||||
zd_mac_rx(mac, skb);
|
||||
}
|
||||
|
||||
int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
|
||||
if (!skb) {
|
||||
dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
skb_reserve(skb, sizeof(struct zd_rt_hdr));
|
||||
memcpy(__skb_put(skb, length), buffer, length);
|
||||
skb_queue_tail(&mac->rx_queue, skb);
|
||||
tasklet_schedule(&mac->rx_tasklet);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
@ -138,6 +138,9 @@ struct zd_mac {
|
||||
struct delayed_work set_rts_cts_work;
|
||||
struct delayed_work set_basic_rates_work;
|
||||
|
||||
struct tasklet_struct rx_tasklet;
|
||||
struct sk_buff_head rx_queue;
|
||||
|
||||
unsigned int stats_count;
|
||||
u8 qual_buffer[ZD_MAC_STATS_BUFFER_SIZE];
|
||||
u8 rssi_buffer[ZD_MAC_STATS_BUFFER_SIZE];
|
||||
@ -193,7 +196,7 @@ int zd_mac_stop(struct net_device *netdev);
|
||||
int zd_mac_set_mac_address(struct net_device *dev, void *p);
|
||||
void zd_mac_set_multicast_list(struct net_device *netdev);
|
||||
|
||||
int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length);
|
||||
int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length);
|
||||
|
||||
int zd_mac_set_regdomain(struct zd_mac *zd_mac, u8 regdomain);
|
||||
u8 zd_mac_get_regdomain(struct zd_mac *zd_mac);
|
||||
|
||||
@ -598,13 +598,13 @@ static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
|
||||
n = l+k;
|
||||
if (n > length)
|
||||
return;
|
||||
zd_mac_rx(mac, buffer+l, k);
|
||||
zd_mac_rx_irq(mac, buffer+l, k);
|
||||
if (i >= 2)
|
||||
return;
|
||||
l = (n+3) & ~3;
|
||||
}
|
||||
} else {
|
||||
zd_mac_rx(mac, buffer, length);
|
||||
zd_mac_rx_irq(mac, buffer, length);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user