mfd: Add devices platform data when the cell data size is not 0

When the cell data_size is 0, the resulting platform_data pointer will be
set to ZERO_SIZE_PTR. That could be misleading for device drivers running
a NULL check on thei platform_data pointer before dereferencing it.

Signed-off-by: Brian Harring <ferringb@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index d1c8605d4ed4..ec99f681e773 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -38,10 +38,12 @@ static int mfd_add_device(struct device *parent, int id,
         pdev->dev.parent = parent;
         platform_set_drvdata(pdev, cell->driver_data);
 
-        ret = platform_device_add_data(pdev,
-                        cell->platform_data, cell->data_size);
-        if (ret)
-                goto fail_res;
+        if (cell->data_size) {
+                ret = platform_device_add_data(pdev,
+                                        cell->platform_data, cell->data_size);
+                if (ret)
+                        goto fail_res;
+        }
 
         for (r = 0; r < cell->num_resources; r++) {
                 res[r].name = cell->resources[r].name;