Mark name parameter of generic device tree helpers as const, as it shouldn't be changed anyway.
Signed-off-by: Shawn Guo shawn.guo@linaro.org --- drivers/dma/dmaengine.c | 2 +- drivers/dma/of-dma.c | 6 +++--- include/linux/dmaengine.h | 7 ++++--- include/linux/of_dma.h | 2 +- 4 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index b2728d6..2cbfefe 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -555,7 +555,7 @@ EXPORT_SYMBOL_GPL(__dma_request_channel); * @dev: pointer to client device structure * @name: slave channel name */ -struct dma_chan *dma_request_slave_channel(struct device *dev, char *name) +struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name) { /* If device-tree is present get slave info from here */ if (dev->of_node) diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 69d04d2..6036cd0 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -172,8 +172,8 @@ EXPORT_SYMBOL_GPL(of_dma_controller_free); * specifiers, matches the name provided. Returns 0 if the name matches and * a valid pointer to the DMA specifier is found. Otherwise returns -ENODEV. */ -static int of_dma_match_channel(struct device_node *np, char *name, int index, - struct of_phandle_args *dma_spec) +static int of_dma_match_channel(struct device_node *np, const char *name, + int index, struct of_phandle_args *dma_spec) { const char *s;
@@ -198,7 +198,7 @@ static int of_dma_match_channel(struct device_node *np, char *name, int index, * Returns pointer to appropriate dma channel on success or NULL on error. */ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, - char *name) + const char *name) { struct of_phandle_args dma_spec; struct of_dma *ofdma; diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 91ac8da..68b4252 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -968,7 +968,8 @@ enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx); void dma_issue_pending_all(void); struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param); -struct dma_chan *dma_request_slave_channel(struct device *dev, char *name); +struct dma_chan *dma_request_slave_channel(struct device *dev, + const char *name); void dma_release_channel(struct dma_chan *chan); #else static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) @@ -984,7 +985,7 @@ static inline struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, return NULL; } static inline struct dma_chan *dma_request_slave_channel(struct device *dev, - char *name) + const char *name) { return NULL; } @@ -1007,7 +1008,7 @@ struct dma_chan *net_dma_find_channel(void); static inline struct dma_chan *__dma_request_slave_channel_compat(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param, struct device *dev, - char *name) + const char *name) { struct dma_chan *chan;
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h index d15073e..0c4a82e 100644 --- a/include/linux/of_dma.h +++ b/include/linux/of_dma.h @@ -40,7 +40,7 @@ extern int of_dma_controller_register(struct device_node *np, void *data); extern int of_dma_controller_free(struct device_node *np); extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np, - char *name); + const char *name); extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma); #else