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[PATCH] ipw2200: disallow direct scanning when device is down

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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 <[email protected]>
Acked-by: Zhu Yi <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Pekka Enberg 2005-11-16 21:55:05 +02:00 • committed by Linus Torvalds
commit efb3442cf1
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/ipw2200.c
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@ -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) {