mac80211: try to workaround some brcmfmac bug with handling interfaces
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> SVN-Revision: 46278
This commit is contained in:
parent
f60082f548
commit
4587e39fe7
1 changed files with 49 additions and 0 deletions
|
@ -0,0 +1,49 @@
|
|||
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
|
||||
Date: Thu, 9 Jul 2015 00:07:59 +0200
|
||||
Subject: [PATCH] brcmfmac: workaround bug with some inconsistent BSSes state
|
||||
MIME-Version: 1.0
|
||||
Content-Type: text/plain; charset=UTF-8
|
||||
Content-Transfer-Encoding: 8bit
|
||||
|
||||
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
|
||||
---
|
||||
|
||||
--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
|
||||
+++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
|
||||
@@ -662,8 +662,36 @@ static struct wireless_dev *brcmf_cfg80211_add_iface(struct wiphy *wiphy,
|
||||
u32 *flags,
|
||||
struct vif_params *params)
|
||||
{
|
||||
+ struct net_device *dev;
|
||||
struct wireless_dev *wdev;
|
||||
|
||||
+ /*
|
||||
+ * There is a bug with in-firmware BSS management. When adding virtual
|
||||
+ * interface brcmfmac first tells firmware to create new BSS and then
|
||||
+ * it creates new struct net_device.
|
||||
+ *
|
||||
+ * If creating/registering netdev(ice) fails, BSS remains in some bugged
|
||||
+ * state. It conflicts with existing BSSes by overtaking their auth
|
||||
+ * requests.
|
||||
+ *
|
||||
+ * It results in one BSS (addresss X) sending beacons and another BSS
|
||||
+ * (address Y) replying to authentication requests. This makes interface
|
||||
+ * unusable as AP.
|
||||
+ *
|
||||
+ * To workaround this bug we may try to guess if register_netdev(ice)
|
||||
+ * will fail. The most obvious case is using interface name that already
|
||||
+ * exists. This is actually quite likely with brcmfmac & some user space
|
||||
+ * scripts as brcmfmac doesn't allow deleting virtual interfaces.
|
||||
+ * So this bug can be triggered even by something trivial like:
|
||||
+ * iw dev wlan0 delete
|
||||
+ * iw phy phy0 interface add wlan0 type __ap
|
||||
+ */
|
||||
+ dev = dev_get_by_name(&init_net, name);
|
||||
+ if (dev) {
|
||||
+ dev_put(dev);
|
||||
+ return ERR_PTR(-EEXIST);
|
||||
+ }
|
||||
+
|
||||
brcmf_dbg(TRACE, "enter: %s type %d\n", name, type);
|
||||
switch (type) {
|
||||
case NL80211_IFTYPE_ADHOC:
|
Loading…
Reference in a new issue