From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Fri, 7 Jun 2013 17:49:00 +0200 Subject: [PATCH 2/2] i2c-mv64xxx: Abort the mv64xxx_of_config if clock-frequency is not provided In-Reply-To: <1370620140-17177-1-git-send-email-gregory.clement@free-electrons.com> References: <1370620140-17177-1-git-send-email-gregory.clement@free-electrons.com> Message-ID: <1370620140-17177-3-git-send-email-gregory.clement@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Zbigniew Bodek 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 at free-electrons.com: Reword the commit log] Signed-off-by: Gregory CLEMENT Signed-off-by: Zbigniew Bodek --- drivers/i2c/busses/i2c-mv64xxx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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; -- 1.8.1.2