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netfs: Fix a NULL vs IS_ERR() check in netfs_perform_write()

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The netfs_grab_folio_for_write() function doesn't return NULL, it returns
error pointers.  Update the check accordingly.

Fixes: c38f4e96e6 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/29fb1310-8e2d-47ba-b68d-40354eb7b896@moroto.mountain/
This commit is contained in:
Dan Carpenter 2024-01-10 21:54:42 +03:00 committed by David Howells
parent 3be0b3ed1d
commit 843609df0b
1 changed files with 3 additions and 2 deletions
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5
fs/netfs/buffered_write.c
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@ -221,10 +221,11 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
if (unlikely(fault_in_iov_iter_readable(iter, part) == part))
break;
ret = -ENOMEM;
folio = netfs_grab_folio_for_write(mapping, pos, part);
if (!folio)
if (IS_ERR(folio)) {
ret = PTR_ERR(folio);
break;
}
flen = folio_size(folio);
offset = pos & (flen - 1);