From 2fd3afc10b9b038d9bfea0828e6738517854914c Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Tue, 15 Jan 2013 11:09:32 +0100 Subject: [PATCH] uterm: fbdev: map FBs for read access We want to provide read-access to users of get_buffers() so map memory with PROT_READ. However, read is almost always horribly slow so this should only be used as fallback. Signed-off-by: David Herrmann --- src/uterm_fbdev_video.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/uterm_fbdev_video.c b/src/uterm_fbdev_video.c index 1983bf8..2ca53fd 100644 --- a/src/uterm_fbdev_video.c +++ b/src/uterm_fbdev_video.c @@ -298,7 +298,7 @@ static int display_activate_force(struct uterm_display *disp, if (disp->flags & DISPLAY_DBUF) len *= 2; - dfb->map = mmap(0, len, PROT_WRITE, MAP_SHARED, dfb->fd, 0); + dfb->map = mmap(0, len, PROT_READ | PROT_WRITE, MAP_SHARED, dfb->fd, 0); if (dfb->map == MAP_FAILED) { log_error("cannot mmap device %s (%d): %m", dfb->node, errno);