[PATCH v3 6/10] mmc: meson-gx: fix error path in meson_mmc_clk_init / meson_mmc_probe

[Michał Zegan]

W dniu 18.02.2017 o 16:22, Heiner Kallweit pisze:
> Am 18.02.2017 um 14:57 schrieb Michał Zegan:
>>
>>
>> W dniu 18.02.2017 o 14:19, Heiner Kallweit pisze:
>>> The condition should be "if (ret)" as the disable/unprepare is
>>> supposed to be executed if the previous command fails.
>>> In addition adjust the error path in probe to properly deal
>>> with the case that cfg_div_clk can be registered successfully
>>> but enable/prepare fails.
>>> In this case we shouldn't call clk_disable_unprepare.
>>>
>>> Reported-by: Michał Zegan <webczat_200 at poczta.onet.pl>
>>> Signed-off-by: Heiner Kallweit <hkallweit1 at gmail.com>
>>> ---
>>> v2:
>>> - extended commit message
>>> v3:
>>> - adjust error path in probe
>>> ---
>>>  drivers/mmc/host/meson-gx-mmc.c | 9 +++++----
>>>  1 file changed, 5 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 68e76fa8..002e4aac 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -321,7 +321,7 @@ static int meson_mmc_clk_init(struct meson_host *host)
>>>  	host->mmc->f_min = clk_round_rate(host->cfg_div_clk, 400000);
>>>  
>>>  	ret = meson_mmc_clk_set(host, host->mmc->f_min);
>>> -	if (!ret)
>>> +	if (ret)
>>>  		clk_disable_unprepare(host->cfg_div_clk);
>>>  
>>>  	return ret;
>>> @@ -771,7 +771,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>  					meson_mmc_irq_thread, IRQF_SHARED,
>>>  					DRIVER_NAME, host);
>>>  	if (ret)
>>> -		goto free_host;
>>> +		goto err_div_clk;
>>>  
>>>  	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>  	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>> @@ -784,7 +784,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>  	if (host->bounce_buf == NULL) {
>>>  		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>  		ret = -ENOMEM;
>>> -		goto free_host;
>>> +		goto err_div_clk;
>>>  	}
>>>  
>>>  	mmc->ops = &meson_mmc_ops;
>>> @@ -792,8 +792,9 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>  
>>>  	return 0;
>>>  
>>> -free_host:
>>> +err_div_clk:
>>>  	clk_disable_unprepare(host->cfg_div_clk);
>>> +free_host:
>>>  	clk_disable_unprepare(host->core_clk);
>>>  	mmc_free_host(mmc);
>>>  	return ret;
>>>
>> Doesn't the same problem exist with a core clock? It also could error
>> when being enabled, and it will be disabled even if not enabled before...
>>
> Yes, there it's basically the same issue. Feel free to submit a patch.
> 
Okay, I will submit a patch based on this series to fix that too, thanks.
Reviewed-by: Michał Zegan <webczat at webczatnet.pl>

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