linux-kernel - Re: [PATCHv2] media: videobuf2: Return error after allocation failure

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Message-ID: <52354072-81c5-4aaa-b3ea-885437e043b0@xs4all.nl>
Date:   Mon, 11 Mar 2019 16:30:04 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Souptick Joarder <jrdr.linux@...il.com>, pawel@...iak.com,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>, mchehab@...nel.org,
        Nicolas Dufresne <nicolas@...fresne.ca>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2] media: videobuf2: Return error after allocation failure

On 3/1/19 4:04 AM, Souptick Joarder wrote:
> On Mon, Feb 11, 2019 at 7:42 AM Souptick Joarder <jrdr.linux@...il.com> wrote:
>>
>> On Mon, Feb 4, 2019 at 8:27 PM Souptick Joarder <jrdr.linux@...il.com> wrote:
>>>
>>> There is no point to continuing assignment after memory allocation
>>> failed, rather throw error immediately.
>>>
>>> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
>>
>> Any comment on this patch ?
> 
> If no further comment, can we get this patch in queue for 5.1 ?

5.1 was too late, but it will certainly go into 5.2.

Regards,

	Hans

>>
>>> ---
>>> v1 -> v2:
>>>         Corrected typo in change log.
>>>
>>>  drivers/media/common/videobuf2/videobuf2-vmalloc.c | 8 ++++----
>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
>>> index 6dfbd5b..d3f71e2 100644
>>> --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
>>> +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
>>> @@ -46,16 +46,16 @@ static void *vb2_vmalloc_alloc(struct device *dev, unsigned long attrs,
>>>
>>>         buf->size = size;
>>>         buf->vaddr = vmalloc_user(buf->size);
>>> -       buf->dma_dir = dma_dir;
>>> -       buf->handler.refcount = &buf->refcount;
>>> -       buf->handler.put = vb2_vmalloc_put;
>>> -       buf->handler.arg = buf;
>>>
>>>         if (!buf->vaddr) {
>>>                 pr_debug("vmalloc of size %ld failed\n", buf->size);
>>>                 kfree(buf);
>>>                 return ERR_PTR(-ENOMEM);
>>>         }
>>> +       buf->dma_dir = dma_dir;
>>> +       buf->handler.refcount = &buf->refcount;
>>> +       buf->handler.put = vb2_vmalloc_put;
>>> +       buf->handler.arg = buf;
>>>
>>>         refcount_set(&buf->refcount, 1);
>>>         return buf;
>>> --
>>> 1.9.1
>>>