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iwlwifi: pcie: reconfigure MSI-X HW on resume

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When going into suspend, the HW configuration for MSI-X will
likely be lost. As a consequence, after waking up, all IRQ
causes will be mapped to interrupt 0, and as a consequence we
don't notice the interrupt because in most cases this is an
interrupt for a queue, and getting it doesn't read the other
cause registers.

Fixes: 2e5d4a8f61 ("iwlwifi: pcie: Add new configuration to enable MSIX")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2017-06-20 12:51:30 +02:00 committed by Luca Coelho
parent 4f555e602b
commit 52848a79b9
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/intel/iwlwifi/pcie/drv.c
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@ -799,6 +799,9 @@ static int iwl_pci_resume(struct device *device)
if (!trans->op_mode) if (!trans->op_mode)
return 0; return 0;
/* reconfigure the MSI-X mapping to get the correct IRQ for rfkill */
iwl_pcie_conf_msix_hw(trans_pcie);
/* /*
* Enable rfkill interrupt (in order to keep track of the rfkill * Enable rfkill interrupt (in order to keep track of the rfkill
* status). Must be locked to avoid processing a possible rfkill * status). Must be locked to avoid processing a possible rfkill