This is a note to let you know that I've just added the patch titled
OPP: Fix passing 0 to PTR_ERR in _opp_attach_genpd()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
opp-fix-passing-0-to-ptr_err-in-_opp_attach_genpd.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e946730388b19e9825a2582b02c5eba5ec880c03
Author: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Date: Fri Jul 21 18:16:34 2023 +0530
OPP: Fix passing 0 to PTR_ERR in _opp_attach_genpd()
[ Upstream commit d920920f85a82c1c806a4143871a0e8f534732f2 ]
If dev_pm_domain_attach_by_name() returns NULL, then 0 will be passed to
PTR_ERR() as reported by the smatch warning below:
drivers/opp/core.c:2456 _opp_attach_genpd() warn: passing zero to 'PTR_ERR'
Fix it by checking for the non-NULL virt_dev pointer before passing it to
PTR_ERR. Otherwise return -ENODEV.
Fixes: 4ea9496cbc95 ("opp: Fix error check in dev_pm_opp_attach_genpd()")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 08f5d1c3d6651..e1810c4011b23 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1882,7 +1882,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
virt_dev = dev_pm_domain_attach_by_name(dev, *name);
if (IS_ERR_OR_NULL(virt_dev)) {
- ret = PTR_ERR(virt_dev) ? : -ENODEV;
+ ret = virt_dev ? PTR_ERR(virt_dev) : -ENODEV;
dev_err(dev, "Couldn't attach to pm_domain: %d\n", ret);
goto err;
}
