mmc: dw_mmc: constify dw_mci_idmac_ops in exynos back-end

The of_device_id match data is now marked as const and
must not be modified. This changes the dw_mmc to mark
all pointers passing the dw_mci_drv_data or dw_mci_dma_ops
structures as const, and also marks the static definitions
as const.

drivers/mmc/host/dw_mmc-exynos.c: In function 'dw_mci_exynos_probe':
drivers/mmc/host/dw_mmc-exynos.c:234:11: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/dw_mmc-exynos.c

@@ -208,7 +208,7 @@ static unsigned long exynos5250_dwmmc_caps[4] = {
 	MMC_CAP_CMD23,
 };
 
-static struct dw_mci_drv_data exynos5250_drv_data = {
+static const struct dw_mci_drv_data exynos5250_drv_data = {
 	.caps			= exynos5250_dwmmc_caps,
 	.init			= dw_mci_exynos_priv_init,
 	.setup_clock		= dw_mci_exynos_setup_clock,
@@ -220,14 +220,14 @@ static struct dw_mci_drv_data exynos5250_drv_data = {
 
 static const struct of_device_id dw_mci_exynos_match[] = {
 	{ .compatible = "samsung,exynos5250-dw-mshc",
-			.data = (void *)&exynos5250_drv_data, },
+			.data = &exynos5250_drv_data, },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dw_mci_exynos_match);
 
 int dw_mci_exynos_probe(struct platform_device *pdev)
 {
-	struct dw_mci_drv_data *drv_data;
+	const struct dw_mci_drv_data *drv_data;
 	const struct of_device_id *match;
 
 	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);

drivers/mmc/host/dw_mmc-pltfm.c

@@ -24,7 +24,7 @@
 #include "dw_mmc.h"
 
 int dw_mci_pltfm_register(struct platform_device *pdev,
-				struct dw_mci_drv_data *drv_data)
+				const struct dw_mci_drv_data *drv_data)
 {
 	struct dw_mci *host;
 	struct resource	*regs;

drivers/mmc/host/dw_mmc-pltfm.h

@@ -13,7 +13,7 @@
 #define _DW_MMC_PLTFM_H_
 
 extern int dw_mci_pltfm_register(struct platform_device *pdev,
-				struct dw_mci_drv_data *drv_data);
+				const struct dw_mci_drv_data *drv_data);
 extern int __devexit dw_mci_pltfm_remove(struct platform_device *pdev);
 extern const struct dev_pm_ops dw_mci_pltfm_pmops;
 

drivers/mmc/host/dw_mmc.c

@@ -435,7 +435,7 @@ static int dw_mci_idmac_init(struct dw_mci *host)
 	return 0;
 }
 
-static struct dw_mci_dma_ops dw_mci_idmac_ops = {
+static const struct dw_mci_dma_ops dw_mci_idmac_ops = {
 	.init = dw_mci_idmac_init,
 	.start = dw_mci_idmac_start_dma,
 	.stop = dw_mci_idmac_stop_dma,

include/linux/mmc/dw_mmc.h

@@ -137,7 +137,7 @@ struct dw_mci {
 
 	dma_addr_t		sg_dma;
 	void			*sg_cpu;
-	struct dw_mci_dma_ops	*dma_ops;
+	const struct dw_mci_dma_ops	*dma_ops;
 #ifdef CONFIG_MMC_DW_IDMAC
 	unsigned int		ring_size;
 #else
@@ -162,7 +162,7 @@ struct dw_mci {
 	u16			data_offset;
 	struct device		*dev;
 	struct dw_mci_board	*pdata;
-	struct dw_mci_drv_data	*drv_data;
+	const struct dw_mci_drv_data	*drv_data;
 	void			*priv;
 	struct clk		*biu_clk;
 	struct clk		*ciu_clk;