[PATCH] pstore: Fix passing zero to 'PTR_ERR' warning

[YueHaibing]

Fix smatch warning:

fs/pstore/platform.c:320 allocate_buf_for_compression() warn: passing zero to 
'PTR_ERR'

crypto_alloc_comp() never return NULL, use IS_ERR
instead of IS_ERR_OR_NULL to fix this.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 fs/pstore/platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 36714df37d5d..b7a2a2a31dee 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -315,7 +315,7 @@ static void allocate_buf_for_compression(void)
        }
 
        ctx = crypto_alloc_comp(zbackend->name, 0, 0);
-       if (IS_ERR_OR_NULL(ctx)) {
+       if (IS_ERR(ctx)) {
                kfree(buf);
                pr_err("crypto_alloc_comp('%s') failed: %ld\n", zbackend->name,
                       PTR_ERR(ctx));
-- 
2.17.1