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From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Kalle Valo <kvalo@codeaurora.org>,
	"David S. Miller" <davem@davemloft.net>
Cc: ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, govinds@codeaurora.org
Subject: [PATCH] ath10k: qmi: Sleep for a while before assigning MSA memory
Date: Wed, 13 Nov 2019 15:35:58 -0800	[thread overview]
Message-ID: <20191113233558.4040259-1-bjorn.andersson@linaro.org> (raw)

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>
---
 drivers/net/wireless/ath/ath10k/qmi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/qmi.c b/drivers/net/wireless/ath/ath10k/qmi.c
index 637f83ef65f8..a0ba07b85362 100644
--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -773,6 +773,13 @@ 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;
-- 
2.23.0


WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Kalle Valo <kvalo@codeaurora.org>,
	"David S. Miller" <davem@davemloft.net>
Cc: govinds@codeaurora.org, netdev@vger.kernel.org,
	linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
	ath10k@lists.infradead.org, linux-arm-msm@vger.kernel.org
Subject: [PATCH] ath10k: qmi: Sleep for a while before assigning MSA memory
Date: Wed, 13 Nov 2019 15:35:58 -0800	[thread overview]
Message-ID: <20191113233558.4040259-1-bjorn.andersson@linaro.org> (raw)

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>
---
 drivers/net/wireless/ath/ath10k/qmi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/qmi.c b/drivers/net/wireless/ath/ath10k/qmi.c
index 637f83ef65f8..a0ba07b85362 100644
--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -773,6 +773,13 @@ 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;
-- 
2.23.0


_______________________________________________
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             reply	other threads:[~2019-11-13 23:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-13 23:35 Bjorn Andersson [this message]
2019-11-13 23:35 ` [PATCH] ath10k: qmi: Sleep for a while before assigning MSA memory Bjorn Andersson
2019-11-15  6:59 ` Kalle Valo
2019-11-15  6:59 ` Kalle Valo

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