mfd: reduce stack usage in mfd-core.c
This patch moves the allocation of the resources off the stack in
mfd_add_device().
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 9c9c126..6c0d1be 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -20,7 +20,7 @@
struct resource *mem_base,
int irq_base)
{
- struct resource res[cell->num_resources];
+ struct resource *res;
struct platform_device *pdev;
int ret = -ENOMEM;
int r;
@@ -29,14 +29,17 @@
if (!pdev)
goto fail_alloc;
+ res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
+ if (!res)
+ goto fail_device;
+
pdev->dev.parent = parent;
ret = platform_device_add_data(pdev,
cell->platform_data, cell->data_size);
if (ret)
- goto fail_device;
+ goto fail_res;
- memset(res, 0, sizeof(res));
for (r = 0; r < cell->num_resources; r++) {
res[r].name = cell->resources[r].name;
res[r].flags = cell->resources[r].flags;
@@ -64,11 +67,15 @@
ret = platform_device_add(pdev);
if (ret)
- goto fail_device;
+ goto fail_res;
+
+ kfree(res);
return 0;
/* platform_device_del(pdev); */
+fail_res:
+ kfree(res);
fail_device:
platform_device_put(pdev);
fail_alloc: