linux-kernel - [PATCH V2 1/1] soc: qcom: smp2p: Add wakeup capability to SMP2P IRQ

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-next>] [day] [month] [year] [list]

Message-Id: <1629108335-23463-1-git-send-email-deesin@codeaurora.org>
Date:   Mon, 16 Aug 2021 15:35:35 +0530
From:   Deepak Kumar Singh <deesin@...eaurora.org>
To:     bjorn.andersson@...aro.org, swboyd@...omium.org,
        clew@...eaurora.org, sibis@...eaurora.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Deepak Kumar Singh <deesin@...eaurora.org>,
        Andy Gross <agross@...nel.org>
Subject: [PATCH V2 1/1] soc: qcom: smp2p: Add wakeup capability to SMP2P IRQ

Remote susbsystems notify fatal crash throught smp2p interrupt.
When modem/wifi crashes it can cause soc to come out of low power state
and may not allow again to enter in low power state until crash is handled.

Mark smp2p interrupt wakeup capable so that interrupt handler is executed
and remote susbsystem crash can be handled in system  resume path.

Signed-off-by: Deepak Kumar Singh <deesin@...eaurora.org>
---
 drivers/soc/qcom/smp2p.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
index 2df4883..646848b 100644
--- a/drivers/soc/qcom/smp2p.c
+++ b/drivers/soc/qcom/smp2p.c
@@ -18,6 +18,7 @@
 #include <linux/soc/qcom/smem.h>
 #include <linux/soc/qcom/smem_state.h>
 #include <linux/spinlock.h>
+#include <linux/pm_wakeirq.h>
 
 /*
  * The Shared Memory Point to Point (SMP2P) protocol facilitates communication
@@ -538,9 +539,20 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
 		goto unwind_interfaces;
 	}
 
+	/* Setup smp2p interrupt as wakeup source */
+	ret = device_init_wakeup(&pdev->dev, true);
+	if (ret)
+		goto unwind_interfaces;
+
+	ret = dev_pm_set_wake_irq(&pdev->dev, irq);
+	if (ret)
+		goto set_wakeup_failed;
 
 	return 0;
 
+set_wakeup_failed:
+	device_init_wakeup(&pdev->dev, false);
+
 unwind_interfaces:
 	list_for_each_entry(entry, &smp2p->inbound, node)
 		irq_domain_remove(entry->domain);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project