Commit fca1fdd2 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Dave Hansen
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x86/mm/iommu/sva: Fix error code for LAM enabling failure due to SVA 



Normally, LAM and SVA are mutually exclusive. LAM enabling will fail if
SVA is already in use.

Correct error code for the failure. EINTR is nonsensical there.

Fixes: 23e5d9ec ("x86/mm/iommu/sva: Make LAM and SVA mutually exclusive")
Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: default avatarDmitry Vyukov <dvyukov@google.com>
Link: https://lore.kernel.org/all/CACT4Y+YfqSMsZArhh25TESmG-U4jO5Hjphz87wKSnTiaw2Wrfw@mail.gmail.com
Link: https://lore.kernel.org/all/20230403111020.3136-2-kirill.shutemov%40linux.intel.com
parent dfd7a156

arch/x86/kernel/process_64.c

+1 −1
Original line number Diff line number Diff line
@@ -758,7 +758,7 @@ static int prctl_enable_tagged_addr(struct mm_struct *mm, unsigned long nr_bits) 


	if (mm_valid_pasid(mm) &&

	    !test_bit(MM_CONTEXT_FORCE_TAGGED_SVA, &mm->context.flags))

		return -EINTR;

		return -EINVAL;



	if (mmap_write_lock_killable(mm))

		return -EINTR;