mwifiex: don't enable/disable IRQ 0 during suspend/resume

If we don't have an out-of-band wakeup IRQ configured through DT (as
most platforms don't), then we fall out of this function with
'irq_wakeup == 0'. Other code (e.g., mwifiex_disable_wake() and
mwifiex_enable_wake()) treats 'irq_wakeup >= 0' as a valid IRQ, and so
we end up calling {enable,disable}_irq() on IRQ 0.

That seems bad, so let's not do that.

Same problem as fixed in this patch:

https://patchwork.kernel.org/patch/9531693/
[PATCH v2 2/3] btmrvl: set irq_bt to -1 when failed to parse it

with the difference that:
(a) this one is actually a regression and
(b) this affects both device tree and non-device-tree systems

While fixing the regression, also drop the verbosity on the parse
failure, so we don't see this when a DT node is present but doesn't have
an interrupt property (this is perfectly legal):

[   21.999000] mwifiex_pcie 0000:01:00.0: fail to parse irq_wakeup from device tree

Fixes: 853402a00823 ("mwifiex: Enable WoWLAN for both sdio and pcie")
Signed-off-by: Brian Norris <briannorris@chromium.org>
Acked-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index 9d80180a551975f34d5b912289029e4d713eec95..5ebca1d0cfc750969793c26ac5f37e858e897fc4 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -1519,13 +1519,13 @@ static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
        struct device *dev = adapter->dev;
 
        if (!dev->of_node)
-               return;
+               goto err_exit;
 
        adapter->dt_node = dev->of_node;
        adapter->irq_wakeup = irq_of_parse_and_map(adapter->dt_node, 0);
        if (!adapter->irq_wakeup) {
-               dev_info(dev, "fail to parse irq_wakeup from device tree\n");
-               return;
+               dev_dbg(dev, "fail to parse irq_wakeup from device tree\n");
+               goto err_exit;
        }
 
        ret = devm_request_irq(dev, adapter->irq_wakeup,
@@ -1545,7 +1545,7 @@ static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
        return;
 
 err_exit:
-       adapter->irq_wakeup = 0;
+       adapter->irq_wakeup = -1;
 }
 
 /*