• Mikulas Patocka's avatar
    udlfb: introduce a rendering mutex · babc250e
    Mikulas Patocka authored
    Rendering calls may be done simultaneously from the workqueue,
    dlfb_ops_write, dlfb_ops_ioctl, dlfb_ops_set_par and dlfb_dpy_deferred_io.
    The code is robust enough so that it won't crash on concurrent rendering.
    
    However, concurrent rendering may cause display corruption if the same
    pixel is simultaneously being rendered. In order to avoid this corruption,
    this patch adds a mutex around the rendering calls.
    Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
    Cc: Bernie Thompson <bernie@plugable.com>
    Cc: Ladislav Michl <ladis@linux-mips.org>
    Cc: <stable@vger.kernel.org>
    [b.zolnierkie: replace "dlfb:" with "uldfb:" in the patch summary]
    Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
    babc250e
udlfb.h 2.91 KB