linux-kernel - [PATCH 4/6] media: uvcvideo: Refactor uvc_ctrl_mappings

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: <20230105-uvc-gcc5-v1-4-8550de720e82@chromium.org>
Date:   Thu, 05 Jan 2023 13:32:15 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yunke Cao <yunkec@...omium.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH 4/6] media: uvcvideo: Refactor uvc_ctrl_mappings_uvcXX

Convert the array of structs into an array of pointers, that way the
mappings can be reused.

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 81 +++++++++++++++++++---------------------
 1 file changed, 39 insertions(+), 42 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 2ebe5cc18ad9..9af64f7a23d3 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -723,34 +723,40 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
 	},
 };
 
-static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = {
-	{
-		.id		= V4L2_CID_POWER_LINE_FREQUENCY,
-		.entity		= UVC_GUID_UVC_PROCESSING,
-		.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
-		.size		= 2,
-		.offset		= 0,
-		.v4l2_type	= V4L2_CTRL_TYPE_MENU,
-		.data_type	= UVC_CTRL_DATA_TYPE_ENUM,
-		.menu_info	= power_line_frequency_controls,
-		.menu_mask	= GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
-					  V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
-	},
+static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
+	.id		= V4L2_CID_POWER_LINE_FREQUENCY,
+	.entity		= UVC_GUID_UVC_PROCESSING,
+	.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
+	.size		= 2,
+	.offset		= 0,
+	.v4l2_type	= V4L2_CTRL_TYPE_MENU,
+	.data_type	= UVC_CTRL_DATA_TYPE_ENUM,
+	.menu_info	= power_line_frequency_controls,
+	.menu_mask	= GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
+				  V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
 };
 
-static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = {
-	{
-		.id		= V4L2_CID_POWER_LINE_FREQUENCY,
-		.entity		= UVC_GUID_UVC_PROCESSING,
-		.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
-		.size		= 2,
-		.offset		= 0,
-		.v4l2_type	= V4L2_CTRL_TYPE_MENU,
-		.data_type	= UVC_CTRL_DATA_TYPE_ENUM,
-		.menu_info	= power_line_frequency_controls,
-		.menu_mask	= GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
-					  V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
-	},
+static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc11[] = {
+	&uvc_ctrl_power_line_mapping_uvc11,
+	NULL, /* Sentinel */
+};
+
+static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = {
+	.id		= V4L2_CID_POWER_LINE_FREQUENCY,
+	.entity		= UVC_GUID_UVC_PROCESSING,
+	.selector	= UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
+	.size		= 2,
+	.offset		= 0,
+	.v4l2_type	= V4L2_CTRL_TYPE_MENU,
+	.data_type	= UVC_CTRL_DATA_TYPE_ENUM,
+	.menu_info	= power_line_frequency_controls,
+	.menu_mask	= GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
+				  V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
+};
+
+static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc15[] = {
+	&uvc_ctrl_power_line_mapping_uvc15,
+	NULL, /* Sentinel */
 };
 
 /* ------------------------------------------------------------------------
@@ -2506,8 +2512,7 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
 static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
 			       struct uvc_control *ctrl)
 {
-	const struct uvc_control_mapping *mappings;
-	unsigned int num_mappings;
+	const struct uvc_control_mapping **mappings;
 	unsigned int i;
 
 	/*
@@ -2574,21 +2579,13 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
 	}
 
 	/* Finally process version-specific mappings. */
-	if (chain->dev->uvc_version < 0x0150) {
-		mappings = uvc_ctrl_mappings_uvc11;
-		num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc11);
-	} else {
-		mappings = uvc_ctrl_mappings_uvc15;
-		num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc15);
-	}
-
-	for (i = 0; i < num_mappings; ++i) {
-		const struct uvc_control_mapping *mapping = &mappings[i];
+	mappings = (chain->dev->uvc_version < 0x0150) ? uvc_ctrl_mappings_uvc11
+						      : uvc_ctrl_mappings_uvc15;
 
-		if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
-		    ctrl->info.selector == mapping->selector)
-			__uvc_ctrl_add_mapping(chain, ctrl, mapping);
-	}
+	for (i = 0; mappings[i]; ++i)
+		if (uvc_entity_match_guid(ctrl->entity, mappings[i]->entity) &&
+		    ctrl->info.selector == mappings[i]->selector)
+			__uvc_ctrl_add_mapping(chain, ctrl, mappings[i]);
 }
 
 /*

-- 
2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae