diff mbox series

[03/11] KVM: guest_memfd: pass error up from filemap_grab_folio

Message ID 20240404185034.3184582-4-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: guest_memfd: New hooks and functionality for SEV-SNP and TDX | expand

Commit Message

Paolo Bonzini April 4, 2024, 6:50 p.m. UTC 
Some SNP ioctls will require the page not to be in the pagecache, and as such they
will want to return EEXIST to userspace.  Start by passing the error up from
filemap_grab_folio.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 virt/kvm/guest_memfd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c
index 5a929536ecf2..409cf9b51313 100644
--- a/virt/kvm/guest_memfd.c
+++ b/virt/kvm/guest_memfd.c
@@ -20,7 +20,7 @@  static struct folio *kvm_gmem_get_folio(struct inode *inode, pgoff_t index)
 	/* TODO: Support huge pages. */
 	folio = filemap_grab_folio(inode->i_mapping, index);
 	if (IS_ERR_OR_NULL(folio))
-		return NULL;
+		return folio;
 
 	/*
 	 * Use the up-to-date flag to track whether or not the memory has been
@@ -146,8 +146,8 @@  static long kvm_gmem_allocate(struct inode *inode, loff_t offset, loff_t len)
 		}
 
 		folio = kvm_gmem_get_folio(inode, index);
-		if (!folio) {
-			r = -ENOMEM;
+		if (IS_ERR_OR_NULL(folio)) {
+			r = folio ? PTR_ERR(folio) : -ENOMEM;
 			break;
 		}