diff mbox

[2/8] pm: domains: avoid potential oops in pm_genpd_remove_device()

Message ID E1YMed5-00054V-QK@rmk-PC.arm.linux.org.uk (mailing list archive)
State RFC, archived
Headers show

Commit Message

Russell King Feb. 14, 2015, 3:27 p.m. UTC 
pm_genpd_remove_device() should only be called with valid and present
pm domain.  There are circumstances where we may end up with something
that isn't a generic PM domain in dev->pm_domain (eg, vga_switcheroo
stuff.)

Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/base/power/domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index b3fbc21da2dc..11a1023fa64a 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1509,7 +1509,7 @@  int pm_genpd_remove_device(struct generic_pm_domain *genpd,
 
 	dev_dbg(dev, "%s()\n", __func__);
 
-	if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)
+	if (!pm_genpd_present(genpd) || IS_ERR_OR_NULL(dev)
 	    ||  IS_ERR_OR_NULL(dev->pm_domain)
 	    ||  pd_to_genpd(dev->pm_domain) != genpd)
 		return -EINVAL;