staging: comedi: 8253: mmio address is a void __iomem *

The inline functions for accessing a memory mapped 8254 device
are using a void * for the 'base_address' of the device. Memory
mapped io using the read/write functions should be using a
void __iomem * for the address.

Fixing these exposed a couple other void * / void __iomem *
issues in the ni_labpc driver.

This fixes a number of sparse warnings like:

  warning: incorrect type in argument 2 (different address spaces)
     expected void volatile [noderef] <asn:2>*addr
     got void *

  warning: incorrect type in argument 1 (different address spaces)
     expected void const volatile [noderef] <asn:2>*addr
     got void *<noident>

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 15 insertions, 12 deletions

diff --git a/drivers/staging/comedi/drivers/8253.h b/drivers/staging/comedi/drivers/8253.h
index 3eb45d46e05b..429e0d60c0a3 100644
--- a/drivers/staging/comedi/drivers/8253.h
+++ b/drivers/staging/comedi/drivers/8253.h
@@ -262,8 +262,10 @@ static inline int i8254_load(unsigned long base_address, unsigned int regshift,
         return 0;
 }
 
-static inline int i8254_mm_load(void *base_address, unsigned int regshift,
-                                unsigned int counter_number, unsigned int count,
+static inline int i8254_mm_load(void __iomem *base_address,
+                                unsigned int regshift,
+                                unsigned int counter_number,
+                                unsigned int count,
                                 unsigned int mode)
 {
         unsigned int byte;
@@ -311,7 +313,8 @@ static inline int i8254_read(unsigned long base_address, unsigned int regshift,
         return ret;
 }
 
-static inline int i8254_mm_read(void *base_address, unsigned int regshift,
+static inline int i8254_mm_read(void __iomem *base_address,
+                                unsigned int regshift,
                                 unsigned int counter_number)
 {
         unsigned int byte;
@@ -348,7 +351,7 @@ static inline void i8254_write(unsigned long base_address,
         outb(byte, base_address + (counter_number << regshift));
 }
 
-static inline void i8254_mm_write(void *base_address,
+static inline void i8254_mm_write(void __iomem *base_address,
                                   unsigned int regshift,
                                   unsigned int counter_number,
                                   unsigned int count)
@@ -390,7 +393,7 @@ static inline int i8254_set_mode(unsigned long base_address,
         return 0;
 }
 
-static inline int i8254_mm_set_mode(void *base_address,
+static inline int i8254_mm_set_mode(void __iomem *base_address,
                                     unsigned int regshift,
                                     unsigned int counter_number,
                                     unsigned int mode)
@@ -419,7 +422,7 @@ static inline int i8254_status(unsigned long base_address,
         return inb(base_address + (counter_number << regshift));
 }
 
-static inline int i8254_mm_status(void *base_address,
+static inline int i8254_mm_status(void __iomem *base_address,
                                   unsigned int regshift,
                                   unsigned int counter_number)
 {
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index 295ddbb4d586..2d060b5cc1b7 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -409,12 +409,12 @@ static inline void labpc_outb(unsigned int byte, unsigned long address)
 
 static inline unsigned int labpc_readb(unsigned long address)
 {
-        return readb((void *)address);
+        return readb((void __iomem *)address);
 }
 
 static inline void labpc_writeb(unsigned int byte, unsigned long address)
 {
-        writeb(byte, (void *)address);
+        writeb(byte, (void __iomem *)address);
 }
 
 static const struct labpc_board_struct labpc_boards[] = {
@@ -494,8 +494,8 @@ static inline int labpc_counter_load(struct comedi_device *dev,
                                      unsigned int count, unsigned int mode)
 {
         if (thisboard->memory_mapped_io)
-                return i8254_mm_load((void *)base_address, 0, counter_number,
-                                     count, mode);
+                return i8254_mm_load((void __iomem *)base_address, 0,
+                                     counter_number, count, mode);
         else
                 return i8254_load(base_address, 0, counter_number, count, mode);
 }
@@ -1896,10 +1896,10 @@ static int labpc_dio_mem_callback(int dir, int port, int data,
                                   unsigned long iobase)
 {
         if (dir) {
-                writeb(data, (void *)(iobase + port));
+                writeb(data, (void __iomem *)(iobase + port));
                 return 0;
         } else {
-                return readb((void *)(iobase + port));
+                return readb((void __iomem *)(iobase + port));
         }
 }