[PATCH hmm 5/8] mm/hmm: add missing call to hmm_range_need_fault() before returning EFAULT

From: Jason Gunthorpe All return paths that do EFAULT must call hmm_range_need_fault() to determine if the user requires this page to be valid. If the page cannot be made valid if the user later requires it, due to vma flags in this case, then the return should be HMM_PFN_ERROR. Fixes:

Re: [PATCH hmm 5/8] mm/hmm: add missing call to hmm_range_need_fault() before returning EFAULT

On 3/11/20 11:35 AM, Jason Gunthorpe wrote: From: Jason Gunthorpe All return paths that do EFAULT must call hmm_range_need_fault() to determine if the user requires this page to be valid. If the page cannot be made valid if the user later requires it, due to vma flags in this case, then the