Blackfin arch: add const to some function prototype and struct dma_channel
Signed-off-by: Michael McTernan <mmcternan@airvana.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index 9befcba..3aa4dd3 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -135,7 +135,7 @@
struct dma_channel {
struct mutex dmalock;
- char *device_id;
+ const char *device_id;
enum dma_chan_status chan_status;
struct dma_register *regs;
struct dmasg *sg; /* large mode descriptor */
@@ -191,7 +191,7 @@
int dma_channel_active(unsigned int channel); /* check if a channel is in use */
void disable_dma(unsigned int channel);
void enable_dma(unsigned int channel);
-int request_dma(unsigned int channel, char *device_id);
+int request_dma(unsigned int channel, const char *device_id);
int set_dma_callback(unsigned int channel, dma_interrupt_t callback,
void *data);
void dma_disable_irq(unsigned int channel);
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 2625aa2..22bce17 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -116,7 +116,7 @@
/*------------------------------------------------------------------------------
* Request the specific DMA channel from the system.
*-----------------------------------------------------------------------------*/
-int request_dma(unsigned int channel, char *device_id)
+int request_dma(unsigned int channel, const char *device_id)
{
pr_debug("request_dma() : BEGIN \n");