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authorDan Carpenter <dan.carpenter@oracle.com>2022-01-11 20:32:43 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-01-26 19:40:33 +0100
commitfc55e63e148f1db2180867da875460a00aac8bd1 (patch)
treea9200a557d53d03ce47e29626d9984938faf405c /drivers
parenta6501e4b380faee6bbf41bb2f833977c7ac6491a (diff)
downloadlinux-fc55e63e148f1db2180867da875460a00aac8bd1.tar.gz
counter: fix an IS_ERR() vs NULL bug
There are 8 callers for devm_counter_alloc() and they all check for NULL instead of error pointers. I think NULL is the better thing to return for allocation functions so update counter_alloc() and devm_counter_alloc() to return NULL instead of error pointers. Fixes: c18e2760308e ("counter: Provide alternative counter registration functions") Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/20220111173243.GA2192@kili Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/counter/counter-core.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
index 7e0957eea094..869894b74741 100644
--- a/drivers/counter/counter-core.c
+++ b/drivers/counter/counter-core.c
@@ -90,10 +90,8 @@ struct counter_device *counter_alloc(size_t sizeof_priv)
int err;
ch = kzalloc(sizeof(*ch) + sizeof_priv, GFP_KERNEL);
- if (!ch) {
- err = -ENOMEM;
- goto err_alloc_ch;
- }
+ if (!ch)
+ return NULL;
counter = &ch->counter;
dev = &counter->dev;
@@ -123,9 +121,8 @@ err_chrdev_add:
err_ida_alloc:
kfree(ch);
-err_alloc_ch:
- return ERR_PTR(err);
+ return NULL;
}
EXPORT_SYMBOL_GPL(counter_alloc);
@@ -208,12 +205,12 @@ struct counter_device *devm_counter_alloc(struct device *dev, size_t sizeof_priv
int err;
counter = counter_alloc(sizeof_priv);
- if (IS_ERR(counter))
- return counter;
+ if (!counter)
+ return NULL;
err = devm_add_action_or_reset(dev, devm_counter_put, counter);
if (err < 0)
- return ERR_PTR(err);
+ return NULL;
return counter;
}