Commit a09a6336 authored Nov 13, 2019 by Bjorn Andersson Committed by Todd Kjos Feb 18, 2021

UPSTREAM: ath10k: qmi: Sleep for a while before assigning MSA memory



commit b70b3a36ec33a2c8d3292f3b33fe2047a8f57b9a upstream.

Unless we sleep for a while before transitioning the MSA memory to WLAN
the MPSS.AT.4.0.c2-01184-SDM845_GEN_PACK-1 firmware triggers a security
violation fairly reliably. Unforutnately recovering from this failure
always results in the entire system freezing.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
(cherry picked from commit b70b3a36ec33a2c8d3292f3b33fe2047a8f57b9a)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: Ie44e86d404f1897b7cc349a03972178374fef89c

parent 2d00c82d

drivers/net/wireless/ath/ath10k/qmi.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -746,6 +746,13 @@ static void ath10k_qmi_event_server_arrive(struct ath10k_qmi *qmi)
		if (ret)
		return;

		/*
		* HACK: sleep for a while inbetween receiving the msa info response
		* and the XPU update to prevent SDM845 from crashing due to a security
		* violation, when running MPSS.AT.4.0.c2-01184-SDM845_GEN_PACK-1.
		*/
		msleep(20);

		ret = ath10k_qmi_setup_msa_permissions(qmi);
		if (ret)
		return;