Re: Question about commit f9a67b1182e5 ("md/bitmap: clear bitmap if bitmap_create failed").

From: Guoqing Jiang
Date: Sun Sep 18 2016 - 05:20:09 EST




On 09/14/2016 04:39 PM, Marion & Christophe JAILLET wrote:

I don't share your feeling.
bitmap_create() can return ERR_PTR(-ENOMEM) or ERR_PTR(-EINVAL).

In such cases 'if (!bitmap)' will not be helpful.

Maybe it should be turned into 'if (IS_ERR_OR_NULL(bitmap))' to handle errors returned by bitmap_create.
Maybe just removing the call to 'bitmap_free(bitmap)' is enough.


I agreed we can remove it, if so, seems we are not consistent with the previous comment of bitmap_create.

/*
* initialize the bitmap structure
* if this returns an error, bitmap_destroy must be called to do clean up
*/

What about revert it and re-use v1 patch? see http://www.spinics.net/lists/raid/msg51819.html.

Thanks,
Guoqing