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soc: qcom: smp2p: Prevent suspend for threaded irq

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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: Chris Lew <clew@codeaurora.org>
This commit is contained in:
Chris Lew 2018-12-19 17:07:27 -08:00 • committed by Gerrit - the friendly Code Review server
commit 11a1ec6583
1 changed files with 15 additions and 2 deletions
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17
drivers/soc/qcom/smp2p.c
View file

@ -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) {