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From: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
To: linux-media@vger.kernel.org
Cc: laurent.pinchart@ideasonboard.com,
	dafna.hirschfeld@collabora.com, helen.koike@collabora.com,
	ezequiel@collabora.com, hverkuil@xs4all.nl, kernel@collabora.com,
	dafna3@gmail.com, sakari.ailus@linux.intel.com,
	linux-rockchip@lists.infradead.org, mchehab@kernel.org,
	tfiga@chromium.org
Subject: [PATCH v3 02/12] media: staging: rkisp1: params: in the isr, return if buffer list is empty
Date: Tue, 22 Sep 2020 13:33:52 +0200	[thread overview]
Message-ID: <20200922113402.12442-3-dafna.hirschfeld@collabora.com> (raw)
In-Reply-To: <20200922113402.12442-1-dafna.hirschfeld@collabora.com>

Currently the code in the isr checks if the buffer list is not
empty before referencing a buffer and then check again if the
buffer is not NULL. Instead we can save one 'if' statement by
returning if the buffers list is empty.
Also remove non-helpful inline doc 'get one empty buffer'

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
---
 drivers/staging/media/rkisp1/rkisp1-params.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/media/rkisp1/rkisp1-params.c b/drivers/staging/media/rkisp1/rkisp1-params.c
index 85f3b340c3bf..8bd7cc622e4f 100644
--- a/drivers/staging/media/rkisp1/rkisp1-params.c
+++ b/drivers/staging/media/rkisp1/rkisp1-params.c
@@ -1198,16 +1198,14 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1)
 		return;
 	}
 
-	/* get one empty buffer */
-	if (!list_empty(&params->params))
-		cur_buf = list_first_entry(&params->params,
-					   struct rkisp1_buffer, queue);
-
-	if (!cur_buf) {
+	if (list_empty(&params->params)) {
 		spin_unlock(&params->config_lock);
 		return;
 	}
 
+	cur_buf = list_first_entry(&params->params,
+				   struct rkisp1_buffer, queue);
+
 	new_params = (struct rkisp1_params_cfg *)(cur_buf->vaddr);
 
 	rkisp1_isp_isr_other_config(params, new_params);
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
To: linux-media@vger.kernel.org
Cc: mchehab@kernel.org, dafna.hirschfeld@collabora.com,
	dafna3@gmail.com, tfiga@chromium.org, 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
Subject: [PATCH v3 02/12] media: staging: rkisp1: params: in the isr, return if buffer list is empty
Date: Tue, 22 Sep 2020 13:33:52 +0200	[thread overview]
Message-ID: <20200922113402.12442-3-dafna.hirschfeld@collabora.com> (raw)
In-Reply-To: <20200922113402.12442-1-dafna.hirschfeld@collabora.com>

Currently the code in the isr checks if the buffer list is not
empty before referencing a buffer and then check again if the
buffer is not NULL. Instead we can save one 'if' statement by
returning if the buffers list is empty.
Also remove non-helpful inline doc 'get one empty buffer'

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
---
 drivers/staging/media/rkisp1/rkisp1-params.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/media/rkisp1/rkisp1-params.c b/drivers/staging/media/rkisp1/rkisp1-params.c
index 85f3b340c3bf..8bd7cc622e4f 100644
--- a/drivers/staging/media/rkisp1/rkisp1-params.c
+++ b/drivers/staging/media/rkisp1/rkisp1-params.c
@@ -1198,16 +1198,14 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1)
 		return;
 	}
 
-	/* get one empty buffer */
-	if (!list_empty(&params->params))
-		cur_buf = list_first_entry(&params->params,
-					   struct rkisp1_buffer, queue);
-
-	if (!cur_buf) {
+	if (list_empty(&params->params)) {
 		spin_unlock(&params->config_lock);
 		return;
 	}
 
+	cur_buf = list_first_entry(&params->params,
+				   struct rkisp1_buffer, queue);
+
 	new_params = (struct rkisp1_params_cfg *)(cur_buf->vaddr);
 
 	rkisp1_isp_isr_other_config(params, new_params);
-- 
2.17.1


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  parent reply	other threads:[~2020-09-22 11:34 UTC|newest]

Thread overview: 54+ 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 ` 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
2020-09-22 11:33   ` Dafna Hirschfeld
2020-09-25 19:08   ` Tomasz Figa
2020-09-25 19:08     ` Tomasz Figa
2020-09-22 11:33 ` Dafna Hirschfeld [this message]
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   ` 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
2020-09-22 11:33   ` Dafna Hirschfeld
2020-09-25 20:16   ` Tomasz Figa
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   ` Dafna Hirschfeld
2020-09-22 11:33 ` [PATCH v3 06/12] media: staging: rkisp1: remove atomic operations for frame sequence Dafna Hirschfeld
2020-09-22 11:33   ` Dafna Hirschfeld
2020-09-25 20:42   ` Tomasz Figa
2020-09-25 20:42     ` Tomasz Figa
2020-10-02  9:16     ` Dafna Hirschfeld
2020-10-02  9:16       ` Dafna Hirschfeld
2020-10-02 15:30       ` Tomasz Figa
2020-10-02 15:30         ` Tomasz Figa
2020-11-06 14:43         ` Helen Koike
2020-11-06 14:43           ` Helen Koike
2020-11-10 10:40           ` Tomasz Figa
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   ` 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   ` 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
2020-09-22 11:33   ` Dafna Hirschfeld
2020-09-25 20:47   ` Tomasz Figa
2020-09-25 20:47     ` Tomasz Figa
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   ` Dafna Hirschfeld
2020-09-22 11:34 ` [PATCH v3 11/12] media: staging: rkisp1: use the right variants of spin_lock Dafna Hirschfeld
2020-09-22 11:34   ` Dafna Hirschfeld
2020-09-25 20:51   ` Tomasz Figa
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
2020-09-22 11:34   ` Dafna Hirschfeld
2020-09-25 20:53   ` Tomasz Figa
2020-09-25 20:53     ` Tomasz Figa
2020-09-27  9:43   ` Mauro Carvalho Chehab
2020-09-27  9:43     ` Mauro Carvalho Chehab
2020-09-27  9:54     ` Dafna Hirschfeld
2020-09-27  9:54       ` Dafna Hirschfeld
2020-09-27 11:05       ` Mauro Carvalho Chehab
2020-09-27 11:05         ` Mauro Carvalho Chehab
2020-09-28 15:29         ` Dafna Hirschfeld
2020-09-28 15:29           ` Dafna Hirschfeld

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