From 0c45b36f8acc89cb94c8696a27574f01e0e411dc Mon Sep 17 00:00:00 2001 From: Jonathan Neuschäfer Date: Fri, 7 Apr 2017 22:02:29 +0200 Subject: drm/udl: Fix unaligned memory access in udl_render_hline MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On SPARC, the udl driver filled my kernel log with these messages: [186668.910612] Kernel unaligned access at TPC[76609c] udl_render_hline+0x13c/0x3a0 Use put_unaligned_be16 to avoid them. On x86 this results in the same code, but on SPARC the compiler emits two single-byte stores. Signed-off-by: Jonathan Neuschäfer Acked-by: David Airlie Signed-off-by: Sean Paul Link: http://patchwork.freedesktop.org/patch/msgid/20170407200229.20642-1-j.neuschaefer@gmx.net --- drivers/gpu/drm/udl/udl_transfer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index 917dcb978c2c..0c87b1ac6b68 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include "udl_drv.h" @@ -163,7 +164,7 @@ static void udl_compress_hline16( const u8 *const start = pixel; const uint16_t repeating_pixel_val16 = pixel_val16; - *(uint16_t *)cmd = cpu_to_be16(pixel_val16); + put_unaligned_be16(pixel_val16, cmd); cmd += 2; pixel += bpp; -- cgit v1.2.3