From 298cd0f0880188422a518e9d780bd49d66ea7ad5 Mon Sep 17 00:00:00 2001 From: Lina Iyer Date: Wed, 28 Oct 2015 15:18:59 -0600 Subject: PM / Domains: Remove dev->driver check for runtime PM Remove check for driver of a device, for runtime PM. Device may be suspended without an explicit driver. This check seems to be vestigial and incorrect in the current context. Reviewed-by: Krzysztof Kozlowski Acked-by: Ulf Hansson Signed-off-by: Kevin Hilman Signed-off-by: Lina Iyer Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index a7dfdf9f15ba..e1c017411aeb 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -321,8 +321,7 @@ static int genpd_poweroff(struct generic_pm_domain *genpd, bool is_async) if (stat > PM_QOS_FLAGS_NONE) return -EBUSY; - if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev) - || pdd->dev->power.irq_safe)) + if (!pm_runtime_suspended(pdd->dev) || pdd->dev->power.irq_safe) not_suspended++; } -- cgit v1.2.3 From 2547923d1cc38b4b55c538e450411586acc39ac6 Mon Sep 17 00:00:00 2001 From: Lina Iyer Date: Wed, 28 Oct 2015 15:19:50 -0600 Subject: PM / Domains: Allocate memory outside domain locks In preparation for supporting IRQ-safe domains, allocate domain data outside the domain locks. These functions are not called in an atomic context, so we can always allocate memory using GFP_KERNEL. By allocating memory before the locks, we can safely lock the domain using spinlocks instead of mutexes. Reviewed-by: Kevin Hilman Acked-by: Ulf Hansson Signed-off-by: Lina Iyer Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index e1c017411aeb..f932058b5db6 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1311,13 +1311,17 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, struct generic_pm_domain *subdomain) { - struct gpd_link *link; + struct gpd_link *link, *itr; int ret = 0; if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain) || genpd == subdomain) return -EINVAL; + link = kzalloc(sizeof(*link), GFP_KERNEL); + if (!link) + return -ENOMEM; + mutex_lock(&genpd->lock); mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING); @@ -1327,18 +1331,13 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, goto out; } - list_for_each_entry(link, &genpd->master_links, master_node) { - if (link->slave == subdomain && link->master == genpd) { + list_for_each_entry(itr, &genpd->master_links, master_node) { + if (itr->slave == subdomain && itr->master == genpd) { ret = -EINVAL; goto out; } } - link = kzalloc(sizeof(*link), GFP_KERNEL); - if (!link) { - ret = -ENOMEM; - goto out; - } link->master = genpd; list_add_tail(&link->master_node, &genpd->master_links); link->slave = subdomain; @@ -1349,7 +1348,8 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, out: mutex_unlock(&subdomain->lock); mutex_unlock(&genpd->lock); - + if (ret) + kfree(link); return ret; } -- cgit v1.2.3