linux-kernel - Re: [PATCH] mmc: sdhci-bcm2835: Actually enable the clock

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] [day] [month] [year] [list]

Date:	Fri, 29 May 2015 14:03:50 -0700
From:	Eric Anholt <eric@...olt.net>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Lee Jones <lee@...nel.org>, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org
Subject: Re: [PATCH] mmc: sdhci-bcm2835: Actually enable the clock

Russell King - ARM Linux <linux@....linux.org.uk> writes:

> On Thu, May 28, 2015 at 05:03:12PM -0700, Eric Anholt wrote:
>> We're currently using a fixed frequency clock specified in the DT, so
>> enabling is a no-op.  However, the RPi firmware-based clocks driver
>> can actually disable unused clocks, so when switching to use it we
>> ended up losing our MMC clock once all devices were probed.
>> 
>> Signed-off-by: Eric Anholt <eric@...olt.net>
>> ---
>>  drivers/mmc/host/sdhci-bcm2835.c | 5 +++++
>>  1 file changed, 5 insertions(+)
>> 
>> diff --git a/drivers/mmc/host/sdhci-bcm2835.c b/drivers/mmc/host/sdhci-bcm2835.c
>> index 0ef0343..09aff3a 100644
>> --- a/drivers/mmc/host/sdhci-bcm2835.c
>> +++ b/drivers/mmc/host/sdhci-bcm2835.c
>> @@ -172,6 +172,11 @@ static int bcm2835_sdhci_probe(struct platform_device *pdev)
>>  		ret = PTR_ERR(pltfm_host->clk);
>>  		goto err;
>>  	}
>> +	ret = clk_prepare_enable(pltfm_host->clk);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "failed to enable host clk\n");
>> +		goto err;
>> +	}
>>  
>>  	return sdhci_add_host(host);
>
> Where's the error clean-up path for a failed sdhci_add_host()?

We were already missing required cleanup in that path, so I didn't
notice.  Sending a new version with a fix for that.

Download attachment "signature.asc" of type "application/pgp-signature" (819 bytes)