lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <84f22803-bd25-4985-a17c-b38bd738b487@collabora.com>
Date:   Fri, 10 Nov 2023 10:55:55 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
        ming.qian@....com, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        kernel@...labora.com, Daniel Almeida <daniel.almeida@...labora.com>
Subject: Re: [PATCH v15 30/56] media: test-drivers: Stop direct calls to queue
 num_buffers field


Le 10/11/2023 à 10:35, Andrzej Pietrasiewicz a écrit :
> Hi Benjamin,
>
> W dniu 9.11.2023 o 17:34, Benjamin Gaignard pisze:
>> Use vb2_get_num_buffers() to avoid using queue num_buffers field 
>> directly.
>> This allows us to change how the number of buffers is computed in the
>> future.
>> If 'min_buffers_needed' is set remove useless checks in queue setup
>> functions.
>>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
>> CC: Daniel Almeida <daniel.almeida@...labora.com>
>> ---
>>   drivers/media/test-drivers/visl/visl-dec.c         | 4 ++--
>>   drivers/media/test-drivers/vivid/vivid-meta-cap.c  | 3 ---
>>   drivers/media/test-drivers/vivid/vivid-meta-out.c  | 5 +++--
>>   drivers/media/test-drivers/vivid/vivid-touch-cap.c | 5 +++--
>>   drivers/media/test-drivers/vivid/vivid-vbi-cap.c   | 3 ---
>>   drivers/media/test-drivers/vivid/vivid-vbi-out.c   | 3 ---
>>   drivers/media/test-drivers/vivid/vivid-vid-cap.c   | 3 ---
>>   drivers/media/test-drivers/vivid/vivid-vid-out.c   | 5 +----
>>   8 files changed, 9 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/media/test-drivers/visl/visl-dec.c 
>> b/drivers/media/test-drivers/visl/visl-dec.c
>> index ba20ea998d19..4672dc5e52bb 100644
>> --- a/drivers/media/test-drivers/visl/visl-dec.c
>> +++ b/drivers/media/test-drivers/visl/visl-dec.c
>> @@ -287,7 +287,7 @@ static void visl_tpg_fill(struct visl_ctx *ctx, 
>> struct visl_run *run)
>>       frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
>>         len = 0;
>> -    for (i = 0; i < out_q->num_buffers; i++) {
>> +    for (i = 0; i < vb2_get_num_buffers(out_q); i++) {
>>           char entry[] = "index: %u, state: %s, request_fd: %d, ";
>>           u32 old_len = len;
>>           struct vb2_buffer *vb2;
>> @@ -347,7 +347,7 @@ static void visl_tpg_fill(struct visl_ctx *ctx, 
>> struct visl_run *run)
>>       frame_dprintk(ctx->dev, run->dst->sequence, "%s\n", buf);
>>         len = 0;
>> -    for (i = 0; i < cap_q->num_buffers; i++) {
>> +    for (i = 0; i < vb2_get_num_buffers(cap_q); i++) {
>>           u32 old_len = len;
>>           struct vb2_buffer *vb2;
>>           char *q_status;
>> diff --git a/drivers/media/test-drivers/vivid/vivid-meta-cap.c 
>> b/drivers/media/test-drivers/vivid/vivid-meta-cap.c
>> index 780f96860a6d..0a718d037e59 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-meta-cap.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-meta-cap.c
>> @@ -30,9 +30,6 @@ static int meta_cap_queue_setup(struct vb2_queue 
>> *vq, unsigned int *nbuffers,
>>           sizes[0] = size;
>>       }
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> -
>>       *nplanes = 1;
>>       return 0;
>>   }
>> diff --git a/drivers/media/test-drivers/vivid/vivid-meta-out.c 
>> b/drivers/media/test-drivers/vivid/vivid-meta-out.c
>> index 95835b52b58f..4a569a6e58be 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-meta-out.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-meta-out.c
>> @@ -18,6 +18,7 @@ static int meta_out_queue_setup(struct vb2_queue 
>> *vq, unsigned int *nbuffers,
>>                   struct device *alloc_devs[])
>>   {
>>       struct vivid_dev *dev = vb2_get_drv_priv(vq);
>> +    unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>>       unsigned int size =  sizeof(struct vivid_meta_out_buf);
>>         if (!vivid_is_webcam(dev))
>> @@ -30,8 +31,8 @@ static int meta_out_queue_setup(struct vb2_queue 
>> *vq, unsigned int *nbuffers,
>>           sizes[0] = size;
>>       }
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> +    if (q_num_bufs + *nbuffers < 2)
>> +        *nbuffers = 2 - q_num_bufs;
>>         *nplanes = 1;
>>       return 0;
>> diff --git a/drivers/media/test-drivers/vivid/vivid-touch-cap.c 
>> b/drivers/media/test-drivers/vivid/vivid-touch-cap.c
>> index c7f6e23df51e..4b3c6ea0afde 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-touch-cap.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-touch-cap.c
>> @@ -13,6 +13,7 @@ static int touch_cap_queue_setup(struct vb2_queue 
>> *vq, unsigned int *nbuffers,
>>                    struct device *alloc_devs[])
>>   {
>>       struct vivid_dev *dev = vb2_get_drv_priv(vq);
>> +    unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>>       struct v4l2_pix_format *f = &dev->tch_format;
>>       unsigned int size = f->sizeimage;
>>   @@ -23,8 +24,8 @@ static int touch_cap_queue_setup(struct vb2_queue 
>> *vq, unsigned int *nbuffers,
>>           sizes[0] = size;
>>       }
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> +    if (q_num_bufs + *nbuffers < 2)
>> +        *nbuffers = 2 - q_num_bufs;
>>         *nplanes = 1;
>>       return 0;
>> diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-cap.c 
>> b/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
>> index b65b02eeeb97..3840b3a664ac 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-vbi-cap.c
>> @@ -134,9 +134,6 @@ static int vbi_cap_queue_setup(struct vb2_queue *vq,
>>         sizes[0] = size;
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> -
>>       *nplanes = 1;
>>       return 0;
>>   }
>> diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-out.c 
>> b/drivers/media/test-drivers/vivid/vivid-vbi-out.c
>> index cd56476902a2..434a10676417 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-vbi-out.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-vbi-out.c
>> @@ -30,9 +30,6 @@ static int vbi_out_queue_setup(struct vb2_queue *vq,
>>         sizes[0] = size;
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> -
>>       *nplanes = 1;
>>       return 0;
>>   }
>> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-cap.c 
>> b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
>> index 3a06df35a2d7..2804975fe278 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-vid-cap.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
>> @@ -117,9 +117,6 @@ static int vid_cap_queue_setup(struct vb2_queue *vq,
>>                       dev->fmt_cap->data_offset[p];
>>       }
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> -
>>       *nplanes = buffers;
>>         dprintk(dev, 1, "%s: count=%d\n", __func__, *nbuffers);
>
> here the format specifier for "*nbuffers" is "%d"...
>
>> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-out.c 
>> b/drivers/media/test-drivers/vivid/vivid-vid-out.c
>> index 184a6df2c29f..1653b2988f7e 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-vid-out.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-vid-out.c
>> @@ -73,12 +73,9 @@ static int vid_out_queue_setup(struct vb2_queue *vq,
>>                          vfmt->data_offset[p] : size;
>>       }
>>   -    if (vq->num_buffers + *nbuffers < 2)
>> -        *nbuffers = 2 - vq->num_buffers;
>> -
>>       *nplanes = planes;
>>   -    dprintk(dev, 1, "%s: count=%d\n", __func__, *nbuffers);
>> +    dprintk(dev, 1, "%s: count=%u\n", __func__, *nbuffers);
>
> ... but here you change it to "%u". Is there a reason for these two to be
> different? I didn't notice it in the previous version but now it 
> stands out
> clearly. Probably you changed to %u because of the type returned by
> vb2_get_num_buffers(). And, actually, *nbuffers _is_ unsigned, too.

Like you said *nbuffers is unsigned so %u sound for me.
The goal of this patch was to avoid vq->num_buffers usage not to clean up all the
file.
That could be done in other patch since there is lot to do here.

Regards,
Benjamin

>
> Regards,
>
> Andrzej
>
>>       for (p = 0; p < planes; p++)
>>           dprintk(dev, 1, "%s: size[%u]=%u\n", __func__, p, sizes[p]);
>>       return 0;
>

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ