netdev - Re: [PATCH 1/2] staging: irda: Replace mdelay with usleep_range in stir421x_fw

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Message-ID: <d65d1116-7ffd-e289-5379-cc052782700d@gmail.com>
Date:   Wed, 11 Apr 2018 15:17:10 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     samuel@...tiz.org, davem@...emloft.net, johan@...nel.org,
        arvind.yadav.cs@...il.com, devel@...verdev.osuosl.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] staging: irda: Replace mdelay with usleep_range in
 stir421x_fw_upload



On 2018/4/11 14:41, Greg KH wrote:
> On Wed, Apr 11, 2018 at 09:29:34AM +0800, Jia-Ju Bai wrote:
>> stir421x_fw_upload() is never called in atomic context.
>>
>> The call chain ending up at stir421x_fw_upload() is:
>> [1] stir421x_fw_upload() <- stir421x_patch_device() <- irda_usb_probe()
>>
>> irda_usb_probe() is set as ".probe" in struct usb_driver.
>> This function is not called in atomic context.
>>
>> Despite never getting called from atomic context, stir421x_fw_upload()
>> calls mdelay() to busily wait.
>> This is not necessary and can be replaced with usleep_range() to
>> avoid busy waiting.
>>
>> This is found by a static analysis tool named DCNS written by myself.
>> And I also manually check it.
>>
>> Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
>> ---
>>   drivers/staging/irda/drivers/irda-usb.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
> Please, at the very least, work off of Linus's tree.  There is no
> drivers/staging/irda/ anymore :)
>

Okay, sorry.
Could you please recommend me a right tree or its git address?


Best wishes,
Jia-Ju Bai