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Commit 11a1ec65 authored by Chris Lew's avatar Chris Lew Committed by Gerrit - the friendly Code Review server
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soc: qcom: smp2p: Prevent suspend for threaded irq 



Add primary IRQ handler that takes a wake source to prevent suspend
while the threaded irq is scheduled and run.

Change-Id: I7ea253320251dc721eea0da5028b69b7ebefdac1
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent e1f0b9a8

drivers/soc/qcom/smp2p.c

+15 −2
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/soc/qcom/smem.h>

#include <linux/soc/qcom/smem_state.h>

#include <linux/spinlock.h>

#include <linux/pm_wakeup.h>



#include <linux/ipc_logging.h>
@@ -152,6 +153,7 @@ struct qcom_smp2p { 
	struct regmap *ipc_regmap;

	int ipc_offset;

	int ipc_bit;

	struct wakeup_source ws;



	struct mbox_client mbox_client;

	struct mbox_chan *mbox_chan;
@@ -288,6 +290,14 @@ static void qcom_smp2p_notify_in(struct qcom_smp2p *smp2p) 
	}

}



static irqreturn_t qcom_smp2p_isr(int irq, void *data)

{

	struct qcom_smp2p *smp2p = data;



	__pm_stay_awake(&smp2p->ws);

	return IRQ_WAKE_THREAD;

}



/**

 * qcom_smp2p_intr() - interrupt handler for incoming notifications

 * @irq:	unused
@@ -312,7 +322,7 @@ static irqreturn_t qcom_smp2p_intr(int irq, void *data) 
		if (IS_ERR(in)) {

			dev_err(smp2p->dev,

				"Unable to acquire remote smp2p item\n");

			return IRQ_HANDLED;

			goto out;

		}



		smp2p->in = in;
@@ -331,6 +341,8 @@ static irqreturn_t qcom_smp2p_intr(int irq, void *data) 
			qcom_smp2p_do_ssr_ack(smp2p);

	}



out:

	__pm_relax(&smp2p->ws);

	return IRQ_HANDLED;

}
@@ -627,12 +639,13 @@ static int qcom_smp2p_probe(struct platform_device *pdev) 
			list_add(&entry->node, &smp2p->outbound);

		}

	}

	wakeup_source_init(&smp2p->ws, "smp2p");



	/* Kick the outgoing edge after allocating entries */

	qcom_smp2p_kick(smp2p);



	ret = devm_request_threaded_irq(&pdev->dev, smp2p->irq,

					NULL, qcom_smp2p_intr,

					qcom_smp2p_isr, qcom_smp2p_intr,

					IRQF_ONESHOT,

					"smp2p", (void *)smp2p);

	if (ret) {