linux-kernel - [PATCH] dma: tegra: add const to of_device

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Date:	Sun, 26 Aug 2012 15:44:23 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<vinod.koul@...el.com>, <djbw@...com>
CC:	<linux-kernel@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
	<swarren@...dia.com>, Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH] dma: tegra: add const to of_device_id.data's structure

The membe "data" of structure of_device_id is changed to const
pointer. Hence initializing this with const type data.
This will fix the compilation warning like
drivers/dma/tegra20-apb-dma.c:1217:9: warning: assignment discards 'const' qualifier from
pointer target type [enabled by default]

This warning came after the change
---------
commit 98d7bbb9929bcc14e11ac8a55245a4f2dc174e17
Author: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
    of: add const to struct *of_device_id.data
---------

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
 drivers/dma/tegra20-apb-dma.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 24acd71..09a15ff 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -201,7 +201,7 @@ struct tegra_dma {
 	struct clk			*dma_clk;
 	spinlock_t			global_lock;
 	void __iomem			*base_addr;
-	struct tegra_dma_chip_data	*chip_data;
+	const struct tegra_dma_chip_data	*chip_data;
 
 	/* Some register need to be cache before suspend */
 	u32				reg_gen;
@@ -1173,14 +1173,14 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
 }
 
 /* Tegra20 specific DMA controller information */
-static struct tegra_dma_chip_data tegra20_dma_chip_data = {
+static const struct tegra_dma_chip_data tegra20_dma_chip_data = {
 	.nr_channels		= 16,
 	.max_dma_count		= 1024UL * 64,
 };
 
 #if defined(CONFIG_OF)
 /* Tegra30 specific DMA controller information */
-static struct tegra_dma_chip_data tegra30_dma_chip_data = {
+static const struct tegra_dma_chip_data tegra30_dma_chip_data = {
 	.nr_channels		= 32,
 	.max_dma_count		= 1024UL * 64,
 };
@@ -1204,7 +1204,7 @@ static int __devinit tegra_dma_probe(struct platform_device *pdev)
 	struct tegra_dma *tdma;
 	int ret;
 	int i;
-	struct tegra_dma_chip_data *cdata = NULL;
+	const struct tegra_dma_chip_data *cdata = NULL;
 
 	if (pdev->dev.of_node) {
 		const struct of_device_id *match;
-- 
1.7.1.1

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