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usb: hub: Simplify error and success path in port_over_current_notify 

kasprintf() returns NULL or valid pointer. Since kfree() can handle
NULL pointer condition, simplify error and success paths in function
port_over_current_notify() by removing multiple error path labels.

Signed-off-by: Bhuvanesh Surachari <Bhuvanesh_Surachari@mentor.com>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Link: https://lore.kernel.org/r/1652369834-4480-1-git-send-email-erosca@de.adit-jv.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bhuvanesh Surachari 2022-05-12 17:37:14 +02:00 committed by Greg Kroah-Hartman
parent dce49449e0
commit 6c5ba7395b
1 changed files with 3 additions and 5 deletions
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8
drivers/usb/core/hub.c
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@ -5511,7 +5511,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
/* Handle notifying userspace about hub over-current events */
static void port_over_current_notify(struct usb_port *port_dev)
{
char *envp[3];
char *envp[3] = { NULL, NULL, NULL };
struct device *hub_dev;
char *port_dev_path;
@ -5528,20 +5528,18 @@ static void port_over_current_notify(struct usb_port *port_dev)
envp[0] = kasprintf(GFP_KERNEL, "OVER_CURRENT_PORT=%s", port_dev_path);
if (!envp[0])
goto exit_path;
goto exit;
envp[1] = kasprintf(GFP_KERNEL, "OVER_CURRENT_COUNT=%u",
port_dev->over_current_count);
if (!envp[1])
goto exit;
envp[2] = NULL;
kobject_uevent_env(&hub_dev->kobj, KOBJ_CHANGE, envp);
kfree(envp[1]);
exit:
kfree(envp[1]);
kfree(envp[0]);
exit_path:
kfree(port_dev_path);
}