1 files changed, 5 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/powernv/opal-msglog.c b/arch/powerpc/platforms/powernv/opal-msglog.c
index 1bb25b952504..44ed78af1a0d 100644
--- a/arch/powerpc/platforms/powernv/opal-msglog.c
+++ b/arch/powerpc/platforms/powernv/opal-msglog.c
@@ -37,7 +37,8 @@ static ssize_t opal_msglog_read(struct file *file, struct kobject *kobj,
 {
         struct memcons *mc = bin_attr->private;
         const char *conbuf;
-        size_t ret, first_read = 0;
+        ssize_t ret;
+        size_t first_read = 0;
         uint32_t out_pos, avail;
 
         if (!mc)
@@ -69,6 +70,9 @@ static ssize_t opal_msglog_read(struct file *file, struct kobject *kobj,
                 to += first_read;
                 count -= first_read;
                 pos -= avail;
+
+                if (count <= 0)
+                        goto out;
         }
 
         /* Sanity check. The firmware should not do this to us. */