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new_sync_write(): discard ->ki_pos unless the return value is positive
[firefly-linux-kernel-4.4.55.git]
/
fs
/
read_write.c
diff --git
a/fs/read_write.c
b/fs/read_write.c
index 45d583c33879e18d89b3fc06d48bbd05a30b6ab3..819ef3faf1bb710678175de06a13f4dcf6e90d62 100644
(file)
--- a/
fs/read_write.c
+++ b/
fs/read_write.c
@@
-477,7
+477,8
@@
static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
ret = filp->f_op->write_iter(&kiocb, &iter);
BUG_ON(ret == -EIOCBQUEUED);
- *ppos = kiocb.ki_pos;
+ if (ret > 0)
+ *ppos = kiocb.ki_pos;
return ret;
}