[kernel] Add patch from Stanislaw Gruszka to fix iwlegacy IBSS cleanup (rhbz 886946)

[Josh Boyer]

commit f6e179360940569a25dea128759e6139e9916bbe
Author: Josh Boyer <jwboyer at redhat.com>
Date:   Wed Jan 16 08:27:12 2013 -0500

    Add patch from Stanislaw Gruszka to fix iwlegacy IBSS cleanup (rhbz 886946)

 iwlegacy-fix-IBSS-cleanup.patch |  104 +++++++++++++++++++++++++++++++++++++++
 kernel.spec                     |   11 ++++-
 2 files changed, 114 insertions(+), 1 deletions(-)
---
diff --git a/iwlegacy-fix-IBSS-cleanup.patch b/iwlegacy-fix-IBSS-cleanup.patch
new file mode 100644
index 0000000..5533aed
--- /dev/null
+++ b/iwlegacy-fix-IBSS-cleanup.patch
@@ -0,0 +1,104 @@
+From 658f1bd2dd632209df00ec66349e15941ffdd83b Mon Sep 17 00:00:00 2001
+From: Stanislaw Gruszka <sgruszka at redhat.com>
+Date: Wed, 16 Jan 2013 10:28:09 +0000
+Subject: [PATCH 3.8] iwlegacy: fix IBSS cleanup
+
+We do not correctly change interface type when switching from
+IBSS mode to STA mode, that results in microcode errors. 
+
+Resolves:
+https://bugzilla.redhat.com/show_bug.cgi?id=886946
+
+Reported-by: Jaroslav Skarvada <jskarvad at redhat.com>
+Cc: stable at vger.kernel.org
+Signed-off-by: Stanislaw Gruszka <sgruszka at redhat.com>
+---
+ drivers/net/wireless/iwlegacy/common.c | 35 ++++++++++++++--------------------
+ 1 file changed, 14 insertions(+), 21 deletions(-)
+
+diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c
+index 7e16d10..90b8970 100644
+--- a/drivers/net/wireless/iwlegacy/common.c
++++ b/drivers/net/wireless/iwlegacy/common.c
+@@ -3958,17 +3958,21 @@ il_connection_init_rx_config(struct il_priv *il)
+ 
+ 	memset(&il->staging, 0, sizeof(il->staging));
+ 
+-	if (!il->vif) {
++	switch (il->iw_mode) {
++	case NL80211_IFTYPE_UNSPECIFIED:
+ 		il->staging.dev_type = RXON_DEV_TYPE_ESS;
+-	} else if (il->vif->type == NL80211_IFTYPE_STATION) {
++		break;
++	case NL80211_IFTYPE_STATION:
+ 		il->staging.dev_type = RXON_DEV_TYPE_ESS;
+ 		il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
+-	} else if (il->vif->type == NL80211_IFTYPE_ADHOC) {
++		break;
++	case NL80211_IFTYPE_ADHOC:
+ 		il->staging.dev_type = RXON_DEV_TYPE_IBSS;
+ 		il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
+ 		il->staging.filter_flags =
+ 		    RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
+-	} else {
++		break;
++	default:
+ 		IL_ERR("Unsupported interface type %d\n", il->vif->type);
+ 		return;
+ 	}
+@@ -4550,8 +4554,7 @@ out:
+ EXPORT_SYMBOL(il_mac_add_interface);
+ 
+ static void
+-il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
+-		      bool mode_change)
++il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
+ {
+ 	lockdep_assert_held(&il->mutex);
+ 
+@@ -4560,9 +4563,7 @@ il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
+ 		il_force_scan_end(il);
+ 	}
+ 
+-	if (!mode_change)
+-		il_set_mode(il);
+-
++	il_set_mode(il);
+ }
+ 
+ void
+@@ -4575,8 +4576,8 @@ il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+ 
+ 	WARN_ON(il->vif != vif);
+ 	il->vif = NULL;
+-
+-	il_teardown_interface(il, vif, false);
++	il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
++	il_teardown_interface(il, vif);
+ 	memset(il->bssid, 0, ETH_ALEN);
+ 
+ 	D_MAC80211("leave\n");
+@@ -4685,18 +4686,10 @@ il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ 	}
+ 
+ 	/* success */
+-	il_teardown_interface(il, vif, true);
+ 	vif->type = newtype;
+ 	vif->p2p = false;
+-	err = il_set_mode(il);
+-	WARN_ON(err);
+-	/*
+-	 * We've switched internally, but submitting to the
+-	 * device may have failed for some reason. Mask this
+-	 * error, because otherwise mac80211 will not switch
+-	 * (and set the interface type back) and we'll be
+-	 * out of sync with it.
+-	 */
++	il->iw_mode = newtype;
++	il_teardown_interface(il, vif);
+ 	err = 0;
+ 
+ out:
+-- 
+1.8.0.2
+
diff --git a/kernel.spec b/kernel.spec
index 426e8c6..9cefbdc 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -62,7 +62,7 @@ Summary: The Linux kernel
 # For non-released -rc kernels, this will be appended after the rcX and
 # gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
 #
-%global baserelease 1
+%global baserelease 2
 %global fedora_build %{baserelease}
 
 # base_sublevel is the kernel version we're starting with and patching
@@ -736,6 +736,9 @@ Patch22070: irqnr-build.patch
 #rhbz 859485
 Patch21226: vt-Drop-K_OFF-for-VC_MUTE.patch
 
+#rhbz 886946
+Patch21227: iwlegacy-fix-IBSS-cleanup.patch
+
 # END OF PATCH DEFINITIONS
 
 %endif
@@ -1418,6 +1421,9 @@ ApplyPatch irqnr-build.patch
 #rhbz 859485
 ApplyPatch vt-Drop-K_OFF-for-VC_MUTE.patch
 
+#rhbz 886946
+ApplyPatch iwlegacy-fix-IBSS-cleanup.patch
+
 # END OF PATCH APPLICATIONS
 
 %endif
@@ -2286,6 +2292,9 @@ fi
 #                 ||----w |
 #                 ||     ||
 %changelog
+* Wed Jan 16 2013 Josh Boyer <jwboyer at redhat.com>
+- Add patch from Stanislaw Gruszka to fix iwlegacy IBSS cleanup (rhbz 886946)
+
 * Tue Jan 15 2013 Justin M. Forbes <jforbes at redhat.com> - 3.8.0-0.rc3.git2.1
 - Linux v3.8-rc3-293-g406089d