linux-kernel - [PATCH 1/3] media: i2c: adv7842: remove open coded version of SMBus block write

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]

Date:   Tue, 19 Jan 2021 10:39:08 +0100
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-i2c@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] media: i2c: adv7842: remove open coded version of SMBus block write

The version here is identical to the one in the I2C core, so use the
latter version directly.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---

Changes since RFC:
* skip define, use i2c_smbus_write_i2c_block_data directly

 drivers/media/i2c/adv7842.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index 0855f648416d..e0629d5ef17b 100644
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -343,20 +343,6 @@ static void adv_smbus_write_byte_no_check(struct i2c_client *client,
 		       I2C_SMBUS_BYTE_DATA, &data);
 }
 
-static s32 adv_smbus_write_i2c_block_data(struct i2c_client *client,
-				  u8 command, unsigned length, const u8 *values)
-{
-	union i2c_smbus_data data;
-
-	if (length > I2C_SMBUS_BLOCK_MAX)
-		length = I2C_SMBUS_BLOCK_MAX;
-	data.block[0] = length;
-	memcpy(data.block + 1, values, length);
-	return i2c_smbus_xfer(client->adapter, client->addr, client->flags,
-			      I2C_SMBUS_WRITE, command,
-			      I2C_SMBUS_I2C_BLOCK_DATA, &data);
-}
-
 /* ----------------------------------------------------------------------- */
 
 static inline int io_read(struct v4l2_subdev *sd, u8 reg)
@@ -741,7 +727,7 @@ static int edid_write_vga_segment(struct v4l2_subdev *sd)
 	rep_write_and_or(sd, 0x77, 0xef, 0x10);
 
 	for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX)
-		err = adv_smbus_write_i2c_block_data(state->i2c_edid, i,
+		err = i2c_smbus_write_i2c_block_data(state->i2c_edid, i,
 					     I2C_SMBUS_BLOCK_MAX, val + i);
 	if (err)
 		return err;
@@ -807,7 +793,7 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port)
 	rep_write_and_or(sd, 0x77, 0xef, 0x00);
 
 	for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX)
-		err = adv_smbus_write_i2c_block_data(state->i2c_edid, i,
+		err = i2c_smbus_write_i2c_block_data(state->i2c_edid, i,
 						     I2C_SMBUS_BLOCK_MAX, edid + i);
 	if (err)
 		return err;
@@ -1079,7 +1065,7 @@ static void configure_custom_video_timings(struct v4l2_subdev *sd,
 		/* Should only be set in auto-graphics mode [REF_02, p. 91-92] */
 		/* setup PLL_DIV_MAN_EN and PLL_DIV_RATIO */
 		/* IO-map reg. 0x16 and 0x17 should be written in sequence */
-		if (adv_smbus_write_i2c_block_data(client, 0x16, 2, pll)) {
+		if (i2c_smbus_write_i2c_block_data(client, 0x16, 2, pll)) {
 			v4l2_err(sd, "writing to reg 0x16 and 0x17 failed\n");
 			break;
 		}
@@ -1135,7 +1121,7 @@ static void adv7842_set_offset(struct v4l2_subdev *sd, bool auto_offset, u16 off
 	offset_buf[3] = offset_c & 0x0ff;
 
 	/* Registers must be written in this order with no i2c access in between */
-	if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x77, 4, offset_buf))
+	if (i2c_smbus_write_i2c_block_data(state->i2c_cp, 0x77, 4, offset_buf))
 		v4l2_err(sd, "%s: i2c error writing to CP reg 0x77, 0x78, 0x79, 0x7a\n", __func__);
 }
 
@@ -1164,7 +1150,7 @@ static void adv7842_set_gain(struct v4l2_subdev *sd, bool auto_gain, u16 gain_a,
 	gain_buf[3] = ((gain_c & 0x0ff));
 
 	/* Registers must be written in this order with no i2c access in between */
-	if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x73, 4, gain_buf))
+	if (i2c_smbus_write_i2c_block_data(state->i2c_cp, 0x73, 4, gain_buf))
 		v4l2_err(sd, "%s: i2c error writing to CP reg 0x73, 0x74, 0x75, 0x76\n", __func__);
 }
 
-- 
2.29.2