linux-kernel - [PATCH net-next 2/2] net: ipa: ignore the microcontroller log event

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Date:   Thu, 12 Nov 2020 06:20:00 -0600
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 2/2] net: ipa: ignore the microcontroller log event

The IPA-resident microcontroller has the ability to log various
activity in an area of IPA shared memory.  When the microcontroller
starts it generates an event to the AP to provide information about
the log.

We don't support reading this log, and we can safely ignore the
event.  So do that rather than treating the log info event we
receive as "unsupported."

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_uc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ipa/ipa_uc.c b/drivers/net/ipa/ipa_uc.c
index b382d47bc70d9..15bb357f3cfb1 100644
--- a/drivers/net/ipa/ipa_uc.c
+++ b/drivers/net/ipa/ipa_uc.c
@@ -129,9 +129,10 @@ static void ipa_uc_event_handler(struct ipa *ipa, enum ipa_irq_id irq_id)
 
 	if (shared->event == IPA_UC_EVENT_ERROR)
 		dev_err(dev, "microcontroller error event\n");
-	else
+	else if (shared->event != IPA_UC_EVENT_LOG_INFO)
 		dev_err(dev, "unsupported microcontroller event %hhu\n",
 			shared->event);
+	/* The LOG_INFO event can be safely ignored */
 }
 
 /* Microcontroller response IPA interrupt handler */
-- 
2.20.1