From: Tang Bin <[email protected]>
Date: Thu,  7 May 2020 19:50:10 +0800

> Use IS_ERR() and PTR_ERR() instead of PTR_ZRR_OR_ZERO()
> to simplify code, avoid redundant judgements.
> 
> Signed-off-by: Zhang Shengju <[email protected]>
> Signed-off-by: Tang Bin <[email protected]>

Saeed, please pick this up.

Thank you.

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