linux-kernel - [PATCH 06/14] arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ storm

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251231-wcn3990-pwrctl-v1-6-1ff4d6028ad5@oss.qualcomm.com>
Date: Wed, 31 Dec 2025 01:35:56 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Jeff Johnson <jjohnson@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Balakrishna Godavarthi <quic_bgodavar@...cinc.com>,
        Matthias Kaehlcke <mka@...omium.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        linux-pm@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 06/14] arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ
 storm

Follow commit 9c92d36b0b1e ("arm64: dts: qcom: qrb2210-rb1: Fix UART3
wakeup IRQ storm") and apply the similar fix to the RB2 platform.

Having RX / TX pins as pull up and wakup interrupt as high-level
triggered generates an interrupt storm when trying to suspend the
device. Avoid the storm by using the falling edge trigger (as all other
platforms do).

Fixes: cab60b166575 ("arm64: dts: qcom: qrb4210-rb2: Enable bluetooth")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index 0cd36c54632f..5f8613150bdd 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -694,7 +694,7 @@ sdc2_card_det_n: sd-card-det-n-state {
 
 &uart3 {
 	interrupts-extended = <&intc GIC_SPI 330 IRQ_TYPE_LEVEL_HIGH>,
-			      <&tlmm 11 IRQ_TYPE_LEVEL_HIGH>;
+			      <&tlmm 11 IRQ_TYPE_EDGE_FALLING>;
 	pinctrl-0 = <&uart3_default>;
 	pinctrl-1 = <&uart3_sleep>;
 	pinctrl-names = "default", "sleep";

-- 
2.47.3