linux-kernel - Re: [PATCH] drivers/rpmsg/virtio_rpmsg_bus.c: fix the return value of rpmsg

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Date:	Wed, 19 Feb 2014 08:54:00 +0800
From:	Barry Song <21cnbao@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ohad Ben-Cohen <ohad@...ery.com>,
	LKML <linux-kernel@...r.kernel.org>,
	DL-SHA-WorkGroupLinux <workgroup.linux@....com>,
	Wei Chen <Wei.Chen@....com>, Barry Song <Baohua.Song@....com>
Subject: Re: [PATCH] drivers/rpmsg/virtio_rpmsg_bus.c: fix the return value of rpmsg_init

2014-02-19 6:19 GMT+08:00 Andrew Morton <akpm@...ux-foundation.org>:
> On Mon, 17 Feb 2014 16:13:34 +0800 Barry Song <21cnbao@...il.com> wrote:
>
>> From: Wei Chen <Wei.Chen@....com>
>>
>> rpmsg_init() always return ERROR code or random integer now, this patch fixes
>> it.
>>
>> ...
>>
>> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
>> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
>> @@ -1096,9 +1096,10 @@ static int __init rpmsg_init(void)
>>       if (ret) {
>>               pr_err("failed to register virtio driver: %d\n", ret);
>>               bus_unregister(&rpmsg_bus);
>> +             return ret;
>>       }
>>
>> -     return ret;
>> +     return 0;
>>  }
>
> Look more closely.  This patch has no effect...

yes, when i look again i find it does have no effect as successful
bus_register() has made ret 0. but the codes are much unreadable
then....

static int __init rpmsg_init(void)
{
        int ret;

        ret = bus_register(&rpmsg_bus);
        if (ret) {
                pr_err("failed to register rpmsg bus: %d\n", ret);
                return ret;
        }

        ret = register_virtio_driver(&virtio_ipc_driver);
        if (ret) {
                pr_err("failed to register virtio driver: %d\n", ret);
                bus_unregister(&rpmsg_bus);
        }

        return ret;
}
subsys_initcall(rpmsg_init);

-barry
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