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Commit 5cdc5246 authored by Avaneesh Kumar Dwivedi's avatar Avaneesh Kumar Dwivedi
Browse files

soc: qcom: ssr: Return from acknowledgment wait if modem is crashed 



During graceful shutdown we await acknowledgment before executing
reset sequence for subsystem, adding check to evaluate if subsys is
crashed in between so that we dont spend time for hopeless ack wait.

Change-Id: I34bba1ebc417a3d6daa3b6e0a38c4b519c82c606
Signed-off-by: default avatarAvaneesh Kumar Dwivedi <akdwived@codeaurora.org>
parent 22194df2

drivers/soc/qcom/subsystem_restart.c

+25 −19
Original line number Diff line number Diff line
@@ -573,25 +573,6 @@ static void disable_all_irqs(struct subsys_device *dev) 
	}

}



int wait_for_shutdown_ack(struct subsys_desc *desc)

{

	int count;



	if (!desc || !desc->shutdown_ack_gpio)

		return 0;



	for (count = SHUTDOWN_ACK_MAX_LOOPS; count > 0; count--) {

		if (gpio_get_value(desc->shutdown_ack_gpio))

			return count;

		msleep(SHUTDOWN_ACK_DELAY_MS);

	}



	pr_err("[%s]: Timed out waiting for shutdown ack\n", desc->name);



	return -ETIMEDOUT;

}

EXPORT_SYMBOL(wait_for_shutdown_ack);



static int wait_for_err_ready(struct subsys_device *subsys)

{

	int ret;
@@ -747,6 +728,31 @@ static void subsys_stop(struct subsys_device *subsys) 
	notify_each_subsys_device(&subsys, 1, SUBSYS_AFTER_SHUTDOWN, NULL);

}



int wait_for_shutdown_ack(struct subsys_desc *desc)

{

	int count;

	struct subsys_device *dev;



	if (!desc || !desc->shutdown_ack_gpio)

		return 0;



	dev = find_subsys(desc->name);

	if (!dev)

		return 0;



	for (count = SHUTDOWN_ACK_MAX_LOOPS; count > 0; count--) {

		if (gpio_get_value(desc->shutdown_ack_gpio))

			return count;

		else if (subsys_get_crash_status(dev))

			break;

		msleep(SHUTDOWN_ACK_DELAY_MS);

	}



	pr_err("[%s]: Timed out waiting for shutdown ack\n", desc->name);

	return -ETIMEDOUT;

}

EXPORT_SYMBOL(wait_for_shutdown_ack);



void *__subsystem_get(const char *name, const char *fw_name)

{

	struct subsys_device *subsys;