[PATCH] b43: only reload config after successful initialization

[Seth Forshee <seth.forshee@xxxxxxxxxxxxx>]

Commit 2a19032 (b43: reload phy and bss settings after core restarts)
introduced an unconditional call to b43_op_config() at the end of
b43_op_start(). When firmware fails to load this can wedge the system.
There's no need to reload the configuration after a failed
initialization anyway, so only make the call if initialization was
successful.

BugLink: http://bugs.launchpad.net/bugs/950295
Cc: Felix Fietkau <nbd@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
---
 drivers/net/wireless/b43/main.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 05ea95b..617afc8 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4841,8 +4841,14 @@ static int b43_op_start(struct ieee80211_hw *hw)
  out_mutex_unlock:
 	mutex_unlock(&wl->mutex);
 
-	/* reload configuration */
-	b43_op_config(hw, ~0);
+	/*
+	 * Configuration may have been overwritten during initialization.
+	 * Reload the configuration, but only if initialization was
+	 * successful. Reloading the configuration after a failed init
+	 * may hang the system.
+	 */
+	if (!err)
+		b43_op_config(hw, ~0);
 
 	return err;
 }
-- 
1.7.9.5

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