The patch titled
zd1211rw: Call ieee80211_rx in tasklet
has been added to the -mm tree. Its filename is
zd1211rw-call-ieee80211_rx-in-tasklet.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: zd1211rw: Call ieee80211_rx in tasklet
From: Ulrich Kunitz <kune@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx>
Cc: "John W. Linville" <linville@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/net/wireless/zd1211rw/zd_mac.c | 96 ++++++++++++++++-------
drivers/net/wireless/zd1211rw/zd_mac.h | 5 -
drivers/net/wireless/zd1211rw/zd_usb.c | 4
3 files changed, 76 insertions(+), 29 deletions(-)
diff -puN drivers/net/wireless/zd1211rw/zd_mac.c~zd1211rw-call-ieee80211_rx-in-tasklet drivers/net/wireless/zd1211rw/zd_mac.c
--- a/drivers/net/wireless/zd1211rw/zd_mac.c~zd1211rw-call-ieee80211_rx-in-tasklet
+++ a/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -41,6 +41,8 @@ static void housekeeping_disable(struct
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 @@ out:
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 *netde
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 *netde
*/
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_de
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 ieee8021
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;
}
diff -puN drivers/net/wireless/zd1211rw/zd_mac.h~zd1211rw-call-ieee80211_rx-in-tasklet drivers/net/wireless/zd1211rw/zd_mac.h
--- a/drivers/net/wireless/zd1211rw/zd_mac.h~zd1211rw-call-ieee80211_rx-in-tasklet
+++ a/drivers/net/wireless/zd1211rw/zd_mac.h
@@ -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 *netde
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);
diff -puN drivers/net/wireless/zd1211rw/zd_usb.c~zd1211rw-call-ieee80211_rx-in-tasklet drivers/net/wireless/zd1211rw/zd_usb.c
--- a/drivers/net/wireless/zd1211rw/zd_usb.c~zd1211rw-call-ieee80211_rx-in-tasklet
+++ a/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -598,13 +598,13 @@ static void handle_rx_packet(struct zd_u
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);
}
}
_
Patches currently in -mm which might be from kune@xxxxxxxxxxxxxx are
origin.patch
ieee80211softmac-fix-errors-related-to-the-work_struct-changes.patch
zd1211rw-call-ieee80211_rx-in-tasklet.patch
-
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