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iwlagn: stop interrupts when suspending 

Occasionally, the device will send interrupts
while it is resuming, at a point where we are
not set up again to handle them. This causes
the core IRQ handling to completely disable
the IRQ, and then the driver won't work again
until it is reloaded/rebound.

To fix this issue disable the IRQ on suspend,
this will cause us to only get interrupts
again after we've setup everything on resume.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-10-10 07:26:57 -07:00 committed by John W. Linville
parent 26bfc0cfdb
commit d36120c625
1 changed files with 6 additions and 1 deletions
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7
drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
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@ -1377,8 +1377,13 @@ static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
* But of course ... if we have configured WoWLAN then we did other
* things already :-)
*/
if (!trans->shrd->wowlan)
if (!trans->shrd->wowlan) {
iwl_apm_stop(priv(trans));
} else {
iwl_disable_interrupts(trans);
iwl_clear_bit(bus(trans), CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
}
return 0;
}