drivers: staging: fbtft: fbtft-bus.c: Fix different address space warning on I/O mem

To fix sparse warning of incorrect type in assignment
(different address space), added annotation __iomem to
vmem8 and modified direct reads with ioread8().

Signed-off-by: Tolga Ceylan <tolga.ceylan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtft-bus.c
index 52af9cbbc2a688c8bb8d18e918ba1469821928c9..912c6328fb872b2b44e403099f1dc16ece47c988 100644 (file)
--- a/drivers/staging/fbtft/fbtft-bus.c
+++ b/drivers/staging/fbtft/fbtft-bus.c
@@ -184,7 +184,7 @@ EXPORT_SYMBOL(fbtft_write_vmem16_bus8);
 /* 16 bit pixel over 9-bit SPI bus: dc + high byte, dc + low byte */
 int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
 {
-       u8 *vmem8;
+       u8 __iomem *vmem8;
        u16 *txbuf16 = par->txbuf.buf;
        size_t remain;
        size_t to_copy;
@@ -212,12 +212,12 @@ int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
 
 #ifdef __LITTLE_ENDIAN
                for (i = 0; i < to_copy; i += 2) {
-                       txbuf16[i]   = 0x0100 | vmem8[i+1];
-                       txbuf16[i+1] = 0x0100 | vmem8[i];
+                       txbuf16[i]     = 0x0100 | ioread8(vmem8 + i + 1);
+                       txbuf16[i + 1] = 0x0100 | ioread8(vmem8 + i);
                }
 #else
                for (i = 0; i < to_copy; i++)
-                       txbuf16[i]   = 0x0100 | vmem8[i];
+                       txbuf16[i]   = 0x0100 | ioread8(vmem8 + i);
 #endif
                vmem8 = vmem8 + to_copy;
                ret = par->fbtftops.write(par, par->txbuf.buf, to_copy*2);