msm: ipa3: add new mutex lock to update is_modem_up flag

Adding new mutex lock to update is_modem_up flag because
in Modem SSR scenarios if we use mutex variable "lock" it
is waiting for it to be released by other thread & partially
leading to SSR timeout. As we don't need to have a common
mutex variable "lock" for this, a new mutex can help in moving
further in clean up the pipes.

Change-Id: I8e6e4c0181f7765b334aefefd9616329503fdc2c
Signed-off-by: Pavan Kumar M <[email protected]>
Signed-off-by: Jagadeesh Ponduru <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa.c

@@ -9874,6 +9874,7 @@ static int ipa3_pre_init(const struct ipa3_plat_drv_res *resource_p,
 	ipa3_ctx->free_page_task_scheduled = false;
 
 	mutex_init(&ipa3_ctx->app_clock_vote.mutex);
+	mutex_init(&ipa3_ctx->ssr_lock);
 	ipa3_ctx->is_modem_up = false;
 	ipa3_ctx->mhi_ctrl_state = IPA_MHI_CTRL_NOT_SETUP;
 

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

@@ -2635,6 +2635,7 @@ struct ipa3_context {
 	struct ipa3_page_recycle_stats prev_default_recycle_stats;
 	struct ipa3_page_recycle_stats prev_low_lat_data_recycle_stats;
 	struct mutex recycle_stats_collection_lock;
+	struct mutex ssr_lock;
 };
 
 struct ipa3_plat_drv_res {

drivers/platform/msm/ipa/ipa_v3/ipa_utils.c

@@ -13932,17 +13932,17 @@ bool ipa3_is_modem_up(void)
 {
 	bool is_up;
 
-	mutex_lock(&ipa3_ctx->lock);
+	mutex_lock(&ipa3_ctx->ssr_lock);
 	is_up = ipa3_ctx->is_modem_up;
-	mutex_unlock(&ipa3_ctx->lock);
+	mutex_unlock(&ipa3_ctx->ssr_lock);
 	return is_up;
 }
 
 void ipa3_set_modem_up(bool is_up)
 {
-	mutex_lock(&ipa3_ctx->lock);
+	mutex_lock(&ipa3_ctx->ssr_lock);
 	ipa3_ctx->is_modem_up = is_up;
-	mutex_unlock(&ipa3_ctx->lock);
+	mutex_unlock(&ipa3_ctx->ssr_lock);
 }
 
 /**