From: Lars Svensson <lars1.svensson@sonymobile.com>
Date: Wed, 7 Oct 2015 07:20:14 +0000 (+0200)
Subject: staging: fbtft: access screen buffer directly
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6b626c77be5ecf34534a45bb2012f6ed0565a0a7;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

staging: fbtft: access screen buffer directly

In fbtft-bus.c:fbtft_write_vmem16_bus9(), ioread8() is used for
accessing the provided screen array. Since screen_buffer actually
points to an ordinary buffer, instead access it directly.

Signed-off-by: Lars Svensson <lars1.svensson@sonymobile.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 9a95fde194d5..58449ad84f46 100644
--- a/drivers/staging/fbtft/fbtft-bus.c
+++ b/drivers/staging/fbtft/fbtft-bus.c
@@ -179,7 +179,7 @@ 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 __iomem *vmem8;
+	u8 *vmem8;
 	u16 *txbuf16 = par->txbuf.buf;
 	size_t remain;
 	size_t to_copy;
@@ -207,12 +207,12 @@ 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 | ioread8(vmem8 + i + 1);
-			txbuf16[i + 1] = 0x0100 | ioread8(vmem8 + i);
+			txbuf16[i]     = 0x0100 | vmem8[i + 1];
+			txbuf16[i + 1] = 0x0100 | vmem8[i];
 		}
 #else
 		for (i = 0; i < to_copy; i++)
-			txbuf16[i]   = 0x0100 | ioread8(vmem8 + i);
+			txbuf16[i]   = 0x0100 | vmem8[i];
 #endif
 		vmem8 = vmem8 + to_copy;
 		ret = par->fbtftops.write(par, par->txbuf.buf, to_copy * 2);