[COMMON] soc: samsung: exynos-pd-dbg: Applied 4.14 change.

Due to below commits, lock for each genpd should be selected.
	d716f47 PM / Domains: Support IRQ safe PM domains
	35241d1 PM / Domains: Abstract genpd locking

Change-Id: I13126fd6b2647da540a4c16eb71da67624456a8f
Signed-off-by: Jang JeongHoon <jnghn.jang@samsung.com>

diff --git a/drivers/soc/samsung/exynos-pd-dbg.c b/drivers/soc/samsung/exynos-pd-dbg.c
index f36421e7daa8e56e446e434f2b15baf8492583c9..440e31737d944981c5267ac42bbbda60c0b68bbe 100644 (file)
--- a/drivers/soc/samsung/exynos-pd-dbg.c
+++ b/drivers/soc/samsung/exynos-pd-dbg.c
@@ -66,6 +66,37 @@ static struct generic_pm_domain *exynos_pd_dbg_dev_to_genpd(struct device *dev)
        return pd_to_genpd(dev->pm_domain);
 }
 
+static void exynos_pd_dbg_genpd_lock_spin(struct generic_pm_domain *genpd)
+       __acquires(&genpd->slock)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&genpd->slock, flags);
+       genpd->lock_flags = flags;
+}
+
+static void exynos_pd_dbg_genpd_unlock_spin(struct generic_pm_domain *genpd)
+       __releases(&genpd->slock)
+{
+       spin_unlock_irqrestore(&genpd->slock, genpd->lock_flags);
+}
+
+static void exynos_pd_dbg_genpd_lock(struct generic_pm_domain *genpd)
+{
+       if (genpd->flags & GENPD_FLAG_IRQ_SAFE)
+               exynos_pd_dbg_genpd_lock_spin(genpd);
+       else
+               mutex_lock(&genpd->mlock);
+}
+
+static void exynos_pd_dbg_genpd_unlock(struct generic_pm_domain *genpd)
+{
+       if (genpd->flags & GENPD_FLAG_IRQ_SAFE)
+               exynos_pd_dbg_genpd_unlock_spin(genpd);
+       else
+               mutex_unlock(&genpd->mlock);
+}
+
 static void exynos_pd_dbg_summary_show(struct generic_pm_domain *genpd)
 {
        static const char * const gpd_status_lookup[] = {
@@ -82,11 +113,11 @@ static void exynos_pd_dbg_summary_show(struct generic_pm_domain *genpd)
        struct pm_domain_data *pm_data;
        struct gpd_link *link;
 
-       mutex_lock(&genpd->lock);
+       exynos_pd_dbg_genpd_lock(genpd);
 
        if (genpd->status >= ARRAY_SIZE(gpd_status_lookup)) {
                pr_err("%s invalid GPD_STATUS\n", EXYNOS_PD_DBG_PREFIX);
-               mutex_unlock(&genpd->lock);
+               exynos_pd_dbg_genpd_unlock(genpd);
                return ;
        }
 
@@ -110,7 +141,7 @@ static void exynos_pd_dbg_summary_show(struct generic_pm_domain *genpd)
        list_for_each_entry(link, &genpd->master_links, master_node)
                exynos_pd_dbg_summary_show(link->slave);
 
-       mutex_unlock(&genpd->lock);
+       exynos_pd_dbg_genpd_unlock(genpd);
 }
 
 static ssize_t exynos_pd_dbg_read(struct file *file, char __user *user_buf,