mm: clear AS_EIO/AS_ENOSPC when writeback initiation fails (cbeaf951) · Commits · 戴 / test

filemap_write_and_wait{_range} will return an error if writeback initiation fails, but won't clear errors in the address_space. This is particularly problematic on DAX, as filemap_fdatawrite* is effectively synchronous there. Ensure that we clear the AS_EIO/AS_ENOSPC flags when filemap_fdatawrite* returns an error. Signed-off-by:

Jeff Layton <jlayton@redhat.com>

mm/filemap.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -515,6 +515,9 @@ int filemap_write_and_wait(struct address_space *mapping)
		int err2 = filemap_fdatawait(mapping);
		if (!err)
		err = err2;
		} else {
		/* Clear any previously stored errors */
		filemap_check_errors(mapping);
		}
		} else {
		err = filemap_check_errors(mapping);
		@@ -549,6 +552,9 @@ int filemap_write_and_wait_range(struct address_space *mapping,
		lstart, lend);
		if (!err)
		err = err2;
		} else {
		/* Clear any previously stored errors */
		filemap_check_errors(mapping);
		}
		} else {
		err = filemap_check_errors(mapping);

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