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drm/omap: fix omap_framebuffer_unpin() error handling

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omap_framebuffer_unpin() check the return value of omap_gem_put_paddr()
and return immediately if omap_gem_put_paddr() fails.

This patch removes the check for the return value, and also removes the
return value of omap_framebuffer_unpin(), because:

 * Nothing checks the return value of omap_framebuffer_unpin(), and even
   something did check it, there's nothing the caller can do to handle
   the error.

 * If a omap_gem_put_paddr() fails, the framebuffer's other planes will
   be left unreleased. So it's better to call omap_gem_put_paddr() for
   all the planes, even if one would fail.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Tomi Valkeinen 2015-04-28 14:01:35 +03:00
parent 96cbd14231
commit 9c368506c9
2 changed files with 5 additions and 13 deletions
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2
drivers/gpu/drm/omapdrm/omap_drv.h
View File

@ -177,7 +177,7 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p);
int omap_framebuffer_pin(struct drm_framebuffer *fb);
int omap_framebuffer_unpin(struct drm_framebuffer *fb);
void omap_framebuffer_unpin(struct drm_framebuffer *fb);
void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
struct omap_drm_window *win, struct omap_overlay_info *info);
struct drm_connector *omap_framebuffer_get_next_connector(

16
drivers/gpu/drm/omapdrm/omap_fb.c
View File

@ -287,10 +287,10 @@ int omap_framebuffer_pin(struct drm_framebuffer *fb)
}
/* unpin, no longer being scanned out: */
int omap_framebuffer_unpin(struct drm_framebuffer *fb)
void omap_framebuffer_unpin(struct drm_framebuffer *fb)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
int ret, i, n = drm_format_num_planes(fb->pixel_format);
int i, n = drm_format_num_planes(fb->pixel_format);
mutex_lock(&omap_fb->lock);
@ -298,24 +298,16 @@ int omap_framebuffer_unpin(struct drm_framebuffer *fb)
if (omap_fb->pin_count > 0) {
mutex_unlock(&omap_fb->lock);
return 0;
return;
}
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
ret = omap_gem_put_paddr(plane->bo);
if (ret)
goto fail;
omap_gem_put_paddr(plane->bo);
plane->paddr = 0;
}
mutex_unlock(&omap_fb->lock);
return 0;
fail:
mutex_unlock(&omap_fb->lock);
return ret;
}
struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)