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[v4,02/10] fscache: Fix fscache_cookie_enabled() to handle NULL cookie

Message ID 163551656895.1877519.8303891885033763947.stgit@warthog.procyon.org.uk (mailing list archive)
State New, archived
Headers show
Series fscache: Replace and remove old I/O API | expand

Commit Message

David Howells Oct. 29, 2021, 2:09 p.m. UTC 
Fix fscache_cookie_enabled() to handle being given a NULL cookie pointer
(ie. a cookie was not allocated and caching should be ignored).

Signed-off-by: David Howells <dhowells@redhat.com>
---

 include/linux/fscache.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 32f65c16328a..5e3ddb11715a 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -167,7 +167,8 @@  struct fscache_cookie {
 
 static inline bool fscache_cookie_enabled(struct fscache_cookie *cookie)
 {
-	return test_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags);
+	return (fscache_cookie_valid(cookie) &&
+		test_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags));
 }
 
 /*