iwlagn: enable only rfkill interrupt when device is down
authorStanislaw Gruszka <sgruszka@redhat.com>
Thu, 23 Dec 2010 11:38:21 +0000 (12:38 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 4 Jan 2011 19:15:08 +0000 (14:15 -0500)
commit554d1d027b19265c4aa3f718b3126d2b86e09a08
tree5f8439d45b8ed972201dfcbdc8dd88533e88cd97
parentb51aff057c9d0ef6c529dc25fd9f775faf7b6c63
iwlagn: enable only rfkill interrupt when device is down

Since commit 6cd0b1cb872b3bf9fc5de4536404206ab74bafdd "iwlagn: fix
hw-rfkill while the interface is down", we enable interrupts when
device is not ready to receive them. However hardware, when it is in
some inconsistent state, can generate other than rfkill interrupts
and crash the system. I can reproduce crash with "kernel BUG at
drivers/net/wireless/iwlwifi/iwl-agn.c:1010!" message, when forcing
firmware restarts.

To fix only enable rfkill interrupt when down device and after probe.
I checked patch on laptop with 5100 device, rfkill change is still
passed to user space when device is down.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: stable@kernel.org
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/iwlwifi/iwl-agn.c
drivers/net/wireless/iwlwifi/iwl-helpers.h