Patchwork [2/2] i2c-mv64xxx: Abort the mv64xxx_of_config if clock-frequency is not provided

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Submitter Gregory CLEMENT
Date June 7, 2013, 3:49 p.m.
Message ID <1370620140-17177-3-git-send-email-gregory.clement@free-electrons.com>
Download mbox | patch
Permalink /patch/249749/
State Changes Requested
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Comments

Gregory CLEMENT - June 7, 2013, 3:49 p.m.
From: Zbigniew Bodek <zbb@semihalf.com>

This commit adds checking whether clock-frequency property acquisition
has succeeded. Do not waste time to find baud factors if there is no
information about the desired bus frequency in dts.

[gregory.clement@free-electrons.com: Reword the commit log]

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Zbigniew Bodek <zbb@semihalf.com>
---
 drivers/i2c/busses/i2c-mv64xxx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
Wolfram Sang - June 14, 2013, 3:23 p.m.
On Fri, Jun 07, 2013 at 05:49:00PM +0200, Gregory CLEMENT wrote:
> From: Zbigniew Bodek <zbb@semihalf.com>
> 
> This commit adds checking whether clock-frequency property acquisition
> has succeeded. Do not waste time to find baud factors if there is no
> information about the desired bus frequency in dts.
> 
> [gregory.clement@free-electrons.com: Reword the commit log]
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> Signed-off-by: Zbigniew Bodek <zbb@semihalf.com>

Please run checkpatch.pl on your patches!

Patch

diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 60cac9f..88c2dd0 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -593,7 +593,9 @@  mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
 		goto out;
 	}
 	tclk = clk_get_rate(drv_data->clk);
-	of_property_read_u32(np, "clock-frequency", &bus_freq);
+	if ((rc = of_property_read_u32(np, "clock-frequency", &bus_freq)) != 0)
+		goto out;
+
 	if (!mv64xxx_find_baud_factors(bus_freq, tclk,
 				       &drv_data->freq_n, &drv_data->freq_m)) {
 		rc = -EINVAL;