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authorOndrej Zary <linux@rainbow-software.org>2015-08-24 21:37:25 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2015-09-24 13:35:36 +0200
commit7f2ea957c1152a7b57c22af2ae603bf66965c06e (patch)
treeb527fb19e635db409917a68e5976f3faa866841b
parentvideo: fbdev: mb862xx: Fix module autoload for OF platform driver (diff)
downloadlinux-7f2ea957c1152a7b57c22af2ae603bf66965c06e.tar.xz
linux-7f2ea957c1152a7b57c22af2ae603bf66965c06e.zip
tridentfb: fix hang on Blade3D with CONFIG_CC_OPTIMIZE_FOR_SIZE
When the kernel is compiled with -Os (CONFIG_CC_OPTIMIZE_FOR_SIZE), tridentfb hangs the machine upon load with Blade3D cards unless acceleration is disabled. This is caused by memcpy() which copies data byte-by-byte (rep movsb) when compiled with -Os. The card does not like that - it requires 32-bit access. Use iowrite_32() instead. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
-rw-r--r--drivers/video/fbdev/tridentfb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/fbdev/tridentfb.c b/drivers/video/fbdev/tridentfb.c
index 7ed9a227f5ea..742971304717 100644
--- a/drivers/video/fbdev/tridentfb.c
+++ b/drivers/video/fbdev/tridentfb.c
@@ -226,7 +226,7 @@ static void blade_image_blit(struct tridentfb_par *par, const char *data,
writemmr(par, DST1, point(x, y));
writemmr(par, DST2, point(x + w - 1, y + h - 1));
- memcpy(par->io_virt + 0x10000, data, 4 * size);
+ iowrite32_rep(par->io_virt + 0x10000, data, size);
}
static void blade_copy_rect(struct tridentfb_par *par,