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authorPekka Enberg <penberg@cs.helsinki.fi>2005-11-16 21:55:05 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-17 08:32:58 -0800
commitefb3442cf1c65747a858476e10f705612383eed1 (patch)
treea093915da40a7887a8c8a3f927177764a55d33d2 /drivers/net
parent0db169f9703115bab09eda5d89a8f6937a7bf98e (diff)
[PATCH] ipw2200: disallow direct scanning when device is down
The function ipw_request_direct_scan() should bail out when the device is down. This fixes a lockup caused by wpa_supplicant triggering ipw_request_direct_scan() while the driver was in a middle of a reset due to firmware errors. Thanks to Zilvinas Valinskas for reporting the bug and helping me debug it. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/ipw2200.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index b0d195d1721..374b682e4d6 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -8926,6 +8926,10 @@ static int ipw_request_direct_scan(struct ipw_priv *priv, char *essid,
struct ipw_scan_request_ext scan;
int err = 0, scan_type;
+ if (!(priv->status & STATUS_INIT) ||
+ (priv->status & STATUS_EXIT_PENDING))
+ return 0;
+
down(&priv->sem);
if (priv->status & STATUS_RF_KILL_MASK) {