[PATCH] perf trace: Fix IS_ERR() vs NULL check bug

[wangguangju]

From: wangguangju <wangguangju@xxxxxxxx>

The alloc_syscall_stats() function always returns an error pointer
(ERR_PTR) on failure.

So replace NULL check with IS_ERR() check after calling
delete_syscall_stats() function.

Signed-off-by: wangguangju <wangguangju@xxxxxxxx>
---
 tools/perf/builtin-trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 311d9da9896a..295b272c6c29 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1573,7 +1573,7 @@ static void delete_syscall_stats(struct hashmap *syscall_stats)
 	struct hashmap_entry *pos;
 	size_t bkt;
 
-	if (syscall_stats == NULL)
+	if (IS_ERR(syscall_stats))
 		return;
 
 	hashmap__for_each_entry(syscall_stats, pos, bkt)
-- 
2.43.0