The field lost_pixels in struct udl_device was supposed to signal an error during USB transfers of the framebuffer data. The driver would have to schedule a re-transfer at a later point. This code was never implemented. Remove lost_pixels and return regular error codes instead.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/udl/udl_drv.h | 1 - drivers/gpu/drm/udl/udl_fb.c | 7 ++++--- drivers/gpu/drm/udl/udl_main.c | 3 --- drivers/gpu/drm/udl/udl_transfer.c | 7 ++++--- 4 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h index d732c9e47812..4de00bddef39 100644 --- a/drivers/gpu/drm/udl/udl_drv.h +++ b/drivers/gpu/drm/udl/udl_drv.h @@ -62,7 +62,6 @@ struct udl_device { int sku_pixel_limit;
struct urb_list urbs; - atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
char mode_buf[1024]; uint32_t mode_buf_len; diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c index 7d184ff96a1f..3c77e8e5e417 100644 --- a/drivers/gpu/drm/udl/udl_fb.c +++ b/drivers/gpu/drm/udl/udl_fb.c @@ -141,9 +141,10 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, const int byte_offset = line_offset + (clip.x1 << log_bpp); const int dev_byte_offset = (fb->width * i + clip.x1) << log_bpp; const int byte_width = (clip.x2 - clip.x1) << log_bpp; - if (udl_render_hline(dev, log_bpp, &urb, (char *)vaddr, - &cmd, byte_offset, dev_byte_offset, - byte_width)) + ret = udl_render_hline(dev, log_bpp, &urb, (char *)vaddr, + &cmd, byte_offset, dev_byte_offset, + byte_width); + if (ret) goto out_drm_gem_shmem_vunmap; }
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index a23218fc7d8e..ff3e98666e8c 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -140,7 +140,6 @@ void udl_urb_completion(struct urb *urb) urb->status == -ESHUTDOWN)) { DRM_ERROR("%s - nonzero write bulk status received: %d\n", __func__, urb->status); - atomic_set(&udl->lost_pixels, 1); } }
@@ -271,7 +270,6 @@ struct urb *udl_get_urb(struct drm_device *dev) /* Wait for an in-flight buffer to complete and get re-queued */ ret = down_timeout(&udl->urbs.limit_sem, GET_URB_TIMEOUT); if (ret) { - atomic_set(&udl->lost_pixels, 1); DRM_INFO("wait for urb interrupted: %x available: %d\n", ret, udl->urbs.available); goto error; @@ -304,7 +302,6 @@ int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len) ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret) { udl_urb_completion(urb); /* because no one else will */ - atomic_set(&udl->lost_pixels, 1); DRM_ERROR("usb_submit_urb error %x\n", ret); } return ret; diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index 5fae48723286..971927669d6b 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -234,11 +234,12 @@ int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
if (cmd >= cmd_end) { int len = cmd - (u8 *) urb->transfer_buffer; - if (udl_submit_urb(dev, urb, len)) - return 1; /* lost pixels is set */ + int ret = udl_submit_urb(dev, urb, len); + if (ret) + return ret; urb = udl_get_urb(dev); if (!urb) - return 1; /* lost_pixels is set */ + return -EAGAIN; *urb_ptr = urb; cmd = urb->transfer_buffer; cmd_end = &cmd[urb->transfer_buffer_length];