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Subjectpull request: wireless-2.6 2010-05-10
Dave,

Here are three more candidates for 2.6.34. I hesitated to push them,
but at least two of them are documented regressions and the other (i.e.
"iwlwifi: work around passive scan issue") avoids some rather annoying
firmware restarts at little or no risk. I think it would be good to
take these now rather than later.

Please let me know if there are problems!

Thanks,

John

---
The following changes since commit 80ea76bb2575c426154b8d61d324197ee3592baa:
David S. Miller (1):
phy: Fix initialization in micrel driver.

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git master

Christian Lamparter (1):
ar9170: wait for asynchronous firmware loading

Johannes Berg (1):
iwlwifi: work around passive scan issue

Reinette Chatre (1):
mac80211: remove association work when processing deauth request

drivers/net/wireless/ath/ar9170/usb.c | 11 +++++++++++
drivers/net/wireless/ath/ar9170/usb.h | 1 +
drivers/net/wireless/iwlwifi/iwl-commands.h | 4 +++-
drivers/net/wireless/iwlwifi/iwl-scan.c | 23 ++++++++++++++++++-----
drivers/net/wireless/iwlwifi/iwl3945-base.c | 3 ++-
net/mac80211/mlme.c | 3 ++-
6 files changed, 37 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c
index 6b1cb70..24dc555 100644
--- a/drivers/net/wireless/ath/ar9170/usb.c
+++ b/drivers/net/wireless/ath/ar9170/usb.c
@@ -726,12 +726,16 @@ static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
{
struct device *parent = aru->udev->dev.parent;

+ complete(&aru->firmware_loading_complete);
+
/* unbind anything failed */
if (parent)
down(&parent->sem);
device_release_driver(&aru->udev->dev);
if (parent)
up(&parent->sem);
+
+ usb_put_dev(aru->udev);
}

static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context)
@@ -760,6 +764,8 @@ static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context)
if (err)
goto err_unrx;

+ complete(&aru->firmware_loading_complete);
+ usb_put_dev(aru->udev);
return;

err_unrx:
@@ -857,6 +863,7 @@ static int ar9170_usb_probe(struct usb_interface *intf,
init_usb_anchor(&aru->tx_pending);
init_usb_anchor(&aru->tx_submitted);
init_completion(&aru->cmd_wait);
+ init_completion(&aru->firmware_loading_complete);
spin_lock_init(&aru->tx_urb_lock);

aru->tx_pending_urbs = 0;
@@ -876,6 +883,7 @@ static int ar9170_usb_probe(struct usb_interface *intf,
if (err)
goto err_freehw;

+ usb_get_dev(aru->udev);
return request_firmware_nowait(THIS_MODULE, 1, "ar9170.fw",
&aru->udev->dev, GFP_KERNEL, aru,
ar9170_usb_firmware_step2);
@@ -895,6 +903,9 @@ static void ar9170_usb_disconnect(struct usb_interface *intf)
return;

aru->common.state = AR9170_IDLE;
+
+ wait_for_completion(&aru->firmware_loading_complete);
+
ar9170_unregister(&aru->common);
ar9170_usb_cancel_urbs(aru);

diff --git a/drivers/net/wireless/ath/ar9170/usb.h b/drivers/net/wireless/ath/ar9170/usb.h
index a2ce3b1..919b060 100644
--- a/drivers/net/wireless/ath/ar9170/usb.h
+++ b/drivers/net/wireless/ath/ar9170/usb.h
@@ -71,6 +71,7 @@ struct ar9170_usb {
unsigned int tx_pending_urbs;

struct completion cmd_wait;
+ struct completion firmware_loading_complete;
int readlen;
u8 *readbuf;

diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index 6383d9f..f4e59ae 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -2621,7 +2621,9 @@ struct iwl_ssid_ie {
#define PROBE_OPTION_MAX_3945 4
#define PROBE_OPTION_MAX 20
#define TX_CMD_LIFE_TIME_INFINITE cpu_to_le32(0xFFFFFFFF)
-#define IWL_GOOD_CRC_TH cpu_to_le16(1)
+#define IWL_GOOD_CRC_TH_DISABLED 0
+#define IWL_GOOD_CRC_TH_DEFAULT cpu_to_le16(1)
+#define IWL_GOOD_CRC_TH_NEVER cpu_to_le16(0xffff)
#define IWL_MAX_SCAN_SIZE 1024
#define IWL_MAX_CMD_SIZE 4096
#define IWL_MAX_PROBE_REQUEST 200
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 5062f4e..2367286 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -812,16 +812,29 @@ static void iwl_bg_request_scan(struct work_struct *data)
rate = IWL_RATE_1M_PLCP;
rate_flags = RATE_MCS_CCK_MSK;
}
- scan->good_CRC_th = 0;
+ scan->good_CRC_th = IWL_GOOD_CRC_TH_DISABLED;
} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
band = IEEE80211_BAND_5GHZ;
rate = IWL_RATE_6M_PLCP;
/*
- * If active scaning is requested but a certain channel
- * is marked passive, we can do active scanning if we
- * detect transmissions.
+ * If active scanning is requested but a certain channel is
+ * marked passive, we can do active scanning if we detect
+ * transmissions.
+ *
+ * There is an issue with some firmware versions that triggers
+ * a sysassert on a "good CRC threshold" of zero (== disabled),
+ * on a radar channel even though this means that we should NOT
+ * send probes.
+ *
+ * The "good CRC threshold" is the number of frames that we
+ * need to receive during our dwell time on a channel before
+ * sending out probes -- setting this to a huge value will
+ * mean we never reach it, but at the same time work around
+ * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
+ * here instead of IWL_GOOD_CRC_TH_DISABLED.
*/
- scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
+ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
+ IWL_GOOD_CRC_TH_NEVER;

/* Force use of chains B and C (0x6) for scan Rx for 4965
* Avoid A (0x1) because of its off-channel reception on A-band.
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index e276f2a..2f47d93 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -2966,7 +2966,8 @@ static void iwl3945_bg_request_scan(struct work_struct *data)
* is marked passive, we can do active scanning if we
* detect transmissions.
*/
- scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
+ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
+ IWL_GOOD_CRC_TH_DISABLED;
band = IEEE80211_BAND_5GHZ;
} else {
IWL_WARN(priv, "Invalid scan band count\n");
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 8a96503..6ccd48e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2029,7 +2029,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
continue;

if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
- wk->type != IEEE80211_WORK_AUTH)
+ wk->type != IEEE80211_WORK_AUTH &&
+ wk->type != IEEE80211_WORK_ASSOC)
continue;

if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.

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