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SubjectRe: [PATCH 6/6] dma: qcom: hidma: no need to check return value of debugfs_create functions
On 6/12/2019 8:25 AM, Greg Kroah-Hartman wrote:
> When calling debugfs functions, there is no need to ever check the
> return value. The function can work or not, but the code logic should
> never do something different based on this.
> Also, because there is no need to save the file dentry, remove the
> variables that were saving them as they were never even being used once
> set.
> Cc: Sinan Kaya <>
> Cc: Andy Gross <>
> Cc: David Brown <>
> Cc: Dan Williams <>
> Cc: Vinod Koul <>
> Cc:
> Cc:
> Cc:
> Cc:
> Signed-off-by: Greg Kroah-Hartman <>

Interesting. Wouldn't debugfs_create_file() blow up if dir is NULL
for some reason?

+ debugfs_create_file("stats", S_IRUGO, dir, chan,
+ &hidma_chan_fops);

Note that code ignores the return value of hidma_debug_init();
It was just trying to do clean up on debugfs failure by calling


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