linux-kernel - Re: [PATCH] pcmcia: pcmcia_resource: return 0 if success

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Date:   Sun, 2 Jan 2022 18:52:19 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     Jason Wang <wangborong@...rlc.com>
Cc:     lee.jones@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pcmcia: pcmcia_resource: return 0 if success

Am Sun, Dec 12, 2021 at 03:56:30PM +0800 schrieb Jason Wang:
> The initial value of variable `ret' is -EINVAL, which is used for
> returning the error status in `pcmcia_release_io' when errors occur.
> But if there is no error in `pcmcia_release_io', `ret' should be changed
> to a successful value to return. Thus we change `ret' value to 0 when
> the function's status is successful.

Thanks for your patch! However, the sole user of pcmcia_release_io() is
not interested in the return value anyway. Therefore, I'd suggest the
following.

Thanks,
	Dominik


pcmcia: make pcmcia_release_io() void, as no-one is interested in return value

As the only user of pcmcia_release_io() is not interested in its return
value, and we cannot do anything on failure, convert the function to return
void.

Reported-by: Jason Wang <wangborong@...rlc.com>
Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>

diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index c1c197292111..d78091e79a0f 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -390,10 +390,9 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev)
  * "stale", we don't bother checking the port ranges against the
  * current socket values.
  */
-static int pcmcia_release_io(struct pcmcia_device *p_dev)
+static void pcmcia_release_io(struct pcmcia_device *p_dev)
 {
 	struct pcmcia_socket *s = p_dev->socket;
-	int ret = -EINVAL;
 	config_t *c;
 
 	mutex_lock(&s->ops_mutex);
@@ -412,8 +411,6 @@ static int pcmcia_release_io(struct pcmcia_device *p_dev)
 
 out:
 	mutex_unlock(&s->ops_mutex);
-
-	return ret;
 } /* pcmcia_release_io */