staging: dwc2: Make dwc2_set_uninitialized more specific

Before, it was a function that would set all members of a given struct
containing only int members to -1. Now, it is renamed to
dwc_set_all_params and it works only on the dwc2_core_params struct.
This makes sure that all of the slightly dubious casting and assumptions
happen inside the function instead of by the caller.

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dwc2/core.h

@@ -162,6 +162,10 @@ enum dwc2_lx_state {
  * parameters define how the DWC_otg controller should be configured.
  */
 struct dwc2_core_params {
+	/*
+	 * Don't add any non-int members here, this will break
+	 * dwc2_set_all_params!
+	 */
 	int otg_cap;
 	int otg_ver;
 	int dma_enable;

drivers/staging/dwc2/hcd.c

@@ -2679,8 +2679,15 @@ static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
 	dwc2_hcd_free(hsotg);
 }
 
-static void dwc2_set_uninitialized(int *p, int size)
+/*
+ * Sets all parameters to the given value.
+ *
+ * Assumes that the dwc2_core_params struct contains only integers.
+ */
+void dwc2_set_all_params(struct dwc2_core_params *params, int value)
 {
+	int *p = (int *)params;
+	size_t size = sizeof(*params) / sizeof(*p);
 	int i;
 
 	for (i = 0; i < size; i++)
@@ -2789,8 +2796,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 	if (!hsotg->core_params)
 		goto error1;
 
-	dwc2_set_uninitialized((int *)hsotg->core_params,
+	dwc2_set_all_params(hsotg->core_params, -1);
-			       sizeof(*hsotg->core_params) / sizeof(int));
 
 	/* Validate parameter values */
 	dwc2_set_parameters(hsotg, params);

drivers/staging/dwc2/hcd.h

@@ -452,6 +452,7 @@ extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
 extern void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
 extern int dwc2_set_parameters(struct dwc2_hsotg *hsotg,
 			       struct dwc2_core_params *params);
+extern void dwc2_set_all_params(struct dwc2_core_params *params, int value);
 
 /* Transaction Execution Functions */
 extern enum dwc2_transaction_type dwc2_hcd_select_transactions(