Re: [PATCH net 2/2] net: ipa: prevent concurrent replenish
From: Matthias Kaehlcke <mka@chromium.org>
Date: 2022-01-11 21:54:46
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linux-arm-msm, lkml
On Tue, Jan 11, 2022 at 01:21:50PM -0600, Alex Elder wrote:
We have seen cases where an endpoint RX completion interrupt arrives
while replenishing for the endpoint is underway. This causes another
instance of replenishing to begin as part of completing the receive
transaction. If this occurs it can lead to transaction corruption.
Use a new atomic variable to ensure only replenish instance for an
endpoint executes at a time.
Fixes: 84f9bd12d46db ("soc: qcom: ipa: IPA endpoints")
Signed-off-by: Alex Elder <redacted>Reviewed-by: Matthias Kaehlcke <mka@chromium.org>