vme: vme_get_size potentially returning incorrect value on failure

The function vme_get_size returns the size of the window to the caller,
however it doesn't check the return value of the call to vme_master_get.

Return 0 on failure rather than anything else.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index 15b64076bc26..bdbadaa47ef3 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -156,12 +156,16 @@ size_t vme_get_size(struct vme_resource *resource)
         case VME_MASTER:
                 retval = vme_master_get(resource, &enabled, &base, &size,
                         &aspace, &cycle, &dwidth);
+                if (retval)
+                        return 0;
 
                 return size;
                 break;
         case VME_SLAVE:
                 retval = vme_slave_get(resource, &enabled, &base, &size,
                         &buf_base, &aspace, &cycle);
+                if (retval)
+                        return 0;
 
                 return size;
                 break;