[Mesa-stable] [PATCH] radeon: Use dup fd as key in drm-winsys hash table to fix ZaphodHeads.

[Ilia Mirkin]

Without being intimately familiar with the radeon winsys code, this
seems sane (esp after re-reviewing the situation for nouveau).
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>. But one of the radeon
people definitely needs to look at this before pushing.

On Sat, Jun 27, 2015 at 9:02 PM, Mario Kleiner
<mario.kleiner.de at gmail.com> wrote:
> Same problem and fix as for nouveau's ZaphodHeads trouble.
>
> See patch ...
>
> "nouveau: Use dup fd as key in drm-winsys hash table to fix ZaphodHeads."
>
> ... for reference.
>
> Cc: "10.3 10.4 10.5 10.6" <mesa-stable at lists.freedesktop.org>
>
> Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
> Cc: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>  src/gallium/winsys/radeon/drm/radeon_drm_winsys.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> index ba8d143..ebdb19e 100644
> --- a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> +++ b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
> @@ -484,6 +484,10 @@ static void radeon_winsys_destroy(struct radeon_winsys *rws)
>      if (ws->gen >= DRV_R600) {
>          radeon_surface_manager_free(ws->surf_man);
>      }
> +
> +    if (ws->fd)
> +        close(ws->fd);
> +
>      FREE(rws);
>  }
>
> @@ -696,7 +700,7 @@ radeon_drm_winsys_create(int fd, radeon_screen_create_t screen_create)
>          return NULL;
>      }
>
> -    ws->fd = fd;
> +    ws->fd = dup(fd);
>
>      if (!do_winsys_init(ws))
>          goto fail;
> @@ -712,7 +716,7 @@ radeon_drm_winsys_create(int fd, radeon_screen_create_t screen_create)
>          goto fail;
>
>      if (ws->gen >= DRV_R600) {
> -        ws->surf_man = radeon_surface_manager_new(fd);
> +        ws->surf_man = radeon_surface_manager_new(ws->fd);
>          if (!ws->surf_man)
>              goto fail;
>      }
> @@ -753,7 +757,7 @@ radeon_drm_winsys_create(int fd, radeon_screen_create_t screen_create)
>          return NULL;
>      }
>
> -    util_hash_table_set(fd_tab, intptr_to_pointer(fd), ws);
> +    util_hash_table_set(fd_tab, intptr_to_pointer(ws->fd), ws);
>
>      /* We must unlock the mutex once the winsys is fully initialized, so that
>       * other threads attempting to create the winsys from the same fd will
> @@ -770,6 +774,9 @@ fail:
>          ws->kman->destroy(ws->kman);
>      if (ws->surf_man)
>          radeon_surface_manager_free(ws->surf_man);
> +    if (ws->fd)
> +        close(ws->fd);
> +
>      FREE(ws);
>      return NULL;
>  }
> --
> 2.1.4
>