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authorDan Williams <dcbw@redhat.com>2008-09-08 16:34:40 -0400
committerJohn W. Linville <linville@tuxdriver.com>2008-09-11 15:53:38 -0400
commit71b35f3abeb8f7f7e0afd7573424540cc5aae2d5 (patch)
tree08c190a3d56d5ca9a4347b797035db63f89592ed /drivers
parent771fd565195727d12f0b75d918b9fcb9f33a5476 (diff)
libertas: clear current command on card removal
If certain commands were in-flight when the card was pulled or the driver rmmod-ed, cleanup would block on the work queue stopping, but the work queue was in turn blocked on the current command being canceled, which didn't happen. Fix that. Signed-off-by: Dan Williams <dcbw@redhat.com> Cc: stable <stable@kernel.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/libertas/main.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index 2436634b6b7e..73dc8c72402a 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -1205,7 +1205,13 @@ void lbs_remove_card(struct lbs_private *priv)
1205 cancel_delayed_work_sync(&priv->scan_work); 1205 cancel_delayed_work_sync(&priv->scan_work);
1206 cancel_delayed_work_sync(&priv->assoc_work); 1206 cancel_delayed_work_sync(&priv->assoc_work);
1207 cancel_work_sync(&priv->mcast_work); 1207 cancel_work_sync(&priv->mcast_work);
1208
1209 /* worker thread destruction blocks on the in-flight command which
1210 * should have been cleared already in lbs_stop_card().
1211 */
1212 lbs_deb_main("destroying worker thread\n");
1208 destroy_workqueue(priv->work_thread); 1213 destroy_workqueue(priv->work_thread);
1214 lbs_deb_main("done destroying worker thread\n");
1209 1215
1210 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { 1216 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1211 priv->psmode = LBS802_11POWERMODECAM; 1217 priv->psmode = LBS802_11POWERMODECAM;
@@ -1323,14 +1329,26 @@ void lbs_stop_card(struct lbs_private *priv)
1323 device_remove_file(&dev->dev, &dev_attr_lbs_rtap); 1329 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1324 } 1330 }
1325 1331
1326 /* Flush pending command nodes */ 1332 /* Delete the timeout of the currently processing command */
1327 del_timer_sync(&priv->command_timer); 1333 del_timer_sync(&priv->command_timer);
1334
1335 /* Flush pending command nodes */
1328 spin_lock_irqsave(&priv->driver_lock, flags); 1336 spin_lock_irqsave(&priv->driver_lock, flags);
1337 lbs_deb_main("clearing pending commands\n");
1329 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) { 1338 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1330 cmdnode->result = -ENOENT; 1339 cmdnode->result = -ENOENT;
1331 cmdnode->cmdwaitqwoken = 1; 1340 cmdnode->cmdwaitqwoken = 1;
1332 wake_up_interruptible(&cmdnode->cmdwait_q); 1341 wake_up_interruptible(&cmdnode->cmdwait_q);
1333 } 1342 }
1343
1344 /* Flush the command the card is currently processing */
1345 if (priv->cur_cmd) {
1346 lbs_deb_main("clearing current command\n");
1347 priv->cur_cmd->result = -ENOENT;
1348 priv->cur_cmd->cmdwaitqwoken = 1;
1349 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1350 }
1351 lbs_deb_main("done clearing commands\n");
1334 spin_unlock_irqrestore(&priv->driver_lock, flags); 1352 spin_unlock_irqrestore(&priv->driver_lock, flags);
1335 1353
1336 unregister_netdev(dev); 1354 unregister_netdev(dev);