Commit 04ec5fe1 authored Dec 03, 2015 by Steven Cahail

soc: qcom: glink: Introduce RX intent request timeout in SSR

The G-Link SSR driver currently does not specify a timeout for
requesting RX intents. If the remote processor is not responding, the
glink_tx() call for sending the SSR notification could wait forever for
an RX intent and block SSR processing for the entire system.

Introduce a 500ms timeout, and restart the remote processor in question
if an intent is not queued within that time. This unblocks SSR
processing in addition to resetting the remote processor.

Change-Id: I2b00afa4e9a1b81355eedcfd7cc786afb058bee7
Signed-off-by: Steven Cahail <scahail@codeaurora.org>

parent 9da3a1e1

drivers/soc/qcom/glink_ssr.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@
		#include "glink_private.h"

		#define GLINK_SSR_REPLY_TIMEOUT HZ
		#define GLINK_SSR_INTENT_REQ_TIMEOUT_MS 500
		#define GLINK_SSR_EVENT_INIT ~0
		#define NUM_LOG_PAGES 3

		@@ -642,6 +643,7 @@ static int configure_and_open_channel(struct subsys_info *ss_info)
		open_cfg.notify_state = glink_ssr_notify_state;
		open_cfg.notify_rx_intent_req = glink_ssr_notify_rx_intent_req;
		open_cfg.priv = ss_info->cb_data;
		open_cfg.rx_intent_req_timeout_ms = GLINK_SSR_INTENT_REQ_TIMEOUT_MS;

		handle = glink_open(&open_cfg);
		if (IS_ERR_OR_NULL(handle)) {