[PATCH] fs/seq_file: Fix warning of passing zero to 'PTR_ERR'

[Vasyl Gomonovych <gomonovych@xxxxxxxxx>]

p could be NULL and passing into PTR_ERR

Signed-off-by: Vasyl Gomonovych <gomonovych@xxxxxxxxx>
---
 fs/seq_file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 4be761c..8b700b9 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -262,8 +262,8 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 		size_t offs = m->count;
 		loff_t next = pos;
 		p = m->op->next(m, p, &next);
-		if (!p || IS_ERR(p)) {
-			err = PTR_ERR(p);
+		if (IS_ERR(p)) {
+			err = (!p ? -EFAULT : PTR_ERR(p));
 			break;
 		}
 		err = m->op->show(m, p);
-- 
1.9.1