diff options
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-msglog.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-msglog.c | 6 |
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. */ |