From: Tomasz Figa <tfiga@chromium.org>
To: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Cc: mchehab@kernel.org, dafna3@gmail.com, hverkuil@xs4all.nl,
linux-rockchip@lists.infradead.org, helen.koike@collabora.com,
laurent.pinchart@ideasonboard.com, sakari.ailus@linux.intel.com,
kernel@collabora.com, ezequiel@collabora.com,
linux-media@vger.kernel.org
Subject: Re: [PATCH v3 09/12] media: staging: rkisp1: stats: protect write to 'is_streaming' in start_streaming cb
Date: Fri, 25 Sep 2020 20:47:56 +0000 [thread overview]
Message-ID: <20200925204756.GH3607091@chromium.org> (raw)
In-Reply-To: <20200922113402.12442-10-dafna.hirschfeld@collabora.com>
Hi Dafna,
On Tue, Sep 22, 2020 at 01:33:59PM +0200, Dafna Hirschfeld wrote:
> The field stats->is_streaming is written in 'start_streaming' callback
> without the stats->lock protection.
> The isr might run together with the callback so 'spin_lock_irq'
> should be used.
>
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
> Acked-by: Helen Koike <helen.koike@collabora.com>
> ---
> drivers/staging/media/rkisp1/rkisp1-stats.c | 2 ++
> 1 file changed, 2 insertions(+)
>
Thank you for the patch. Please see my comments inline.
> diff --git a/drivers/staging/media/rkisp1/rkisp1-stats.c b/drivers/staging/media/rkisp1/rkisp1-stats.c
> index 6aa18d970f2b..51c64f75fe29 100644
> --- a/drivers/staging/media/rkisp1/rkisp1-stats.c
> +++ b/drivers/staging/media/rkisp1/rkisp1-stats.c
> @@ -157,7 +157,9 @@ rkisp1_stats_vb2_start_streaming(struct vb2_queue *queue, unsigned int count)
> {
> struct rkisp1_stats *stats = queue->drv_priv;
>
> + spin_lock_irq(&stats->lock);
> stats->is_streaming = true;
Do we need this separate stream? This is a similar note to the
parameters patch - it should be possible to handle this based on the
presence of the buffers in the list, without a custom flag.
Best regards,
Tomasz
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next prev parent reply other threads:[~2020-09-25 20:48 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 11:33 [PATCH v3 00/12] media: staging: rkisp1: various bug fixes Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 01/12] media: staging: rkisp1: params: upon stream stop, iterate a local list to return the buffers Dafna Hirschfeld
2020-09-25 19:08 ` Tomasz Figa
2020-09-22 11:33 ` [PATCH v3 02/12] media: staging: rkisp1: params: in the isr, return if buffer list is empty Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 03/12] media: staging: rkisp1: params: use the new effect value in cproc config Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 04/12] media: staging: rkisp1: params: avoid using buffer if params is not streaming Dafna Hirschfeld
2020-09-25 20:16 ` Tomasz Figa
2020-09-22 11:33 ` [PATCH v3 05/12] media: staging: rkisp1: params: set vb.sequence to be the isp's frame_sequence + 1 Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 06/12] media: staging: rkisp1: remove atomic operations for frame sequence Dafna Hirschfeld
2020-09-25 20:42 ` Tomasz Figa
2020-10-02 9:16 ` Dafna Hirschfeld
2020-10-02 15:30 ` Tomasz Figa
2020-11-06 14:43 ` Helen Koike
2020-11-10 10:40 ` Tomasz Figa
2020-09-22 11:33 ` [PATCH v3 07/12] media: staging: rkisp1: isp: add a warning and debugfs var for irq delay Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 08/12] media: staging: rkisp1: isp: don't enable signal RKISP1_CIF_ISP_FRAME_IN Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 09/12] media: staging: rkisp1: stats: protect write to 'is_streaming' in start_streaming cb Dafna Hirschfeld
2020-09-25 20:47 ` Tomasz Figa [this message]
2020-09-22 11:34 ` [PATCH v3 10/12] media: staging: rkisp1: params: no need to lock default config Dafna Hirschfeld
2020-09-22 11:34 ` [PATCH v3 11/12] media: staging: rkisp1: use the right variants of spin_lock Dafna Hirschfeld
2020-09-25 20:51 ` Tomasz Figa
2020-09-22 11:34 ` [PATCH v3 12/12] media: staging: rkisp1: cap: protect access to buf with the spin lock Dafna Hirschfeld
2020-09-25 20:53 ` Tomasz Figa
2020-09-27 9:43 ` Mauro Carvalho Chehab
2020-09-27 9:54 ` Dafna Hirschfeld
2020-09-27 11:05 ` Mauro Carvalho Chehab
2020-09-28 15:29 ` Dafna Hirschfeld
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