tree 53a738873641c73899846298d0a9b3351697d5fa
parent 502c12e1ef14967e08dabb04c674cf0f000e8f7e
author John W. Linville <linville@tuxdriver.com> 1225390341 -0400
committer John W. Linville <linville@tuxdriver.com> 1226007429 -0500

iwlagn: avoid sleep in softirq context

__ieee80211_tasklet_handler -> __ieee80211_rx ->
	__ieee80211_rx_handle_packet -> ieee80211_invoke_rx_handlers ->
	ieee80211_rx_h_decrypt -> ieee80211_crypto_tkip_decrypt ->
	ieee80211_tkip_decrypt_data -> iwl4965_mac_update_tkip_key ->
	iwl_scan_cancel_timeout -> msleep

Ooops!

Avoid the sleep by changing iwl_scan_cancel_timeout with
iwl_scan_cancel and simply returning on failure if the scan persists.
This will cause hardware decryption to fail and we'll handle a few more
frames with software decryption.

Signed-off-by: John W. Linville <linville@tuxdriver.com>