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dmabuf: Seek back to the start

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https://docs.kernel.org/driver-api/dma-buf.html recommends doing that,
so we do that.
This commit is contained in:
Benjamin Otte 2023-10-23 16:56:33 +02:00
parent e688be1cff
commit 323300e92a
1 changed files with 2 additions and 0 deletions
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2
gdk/gdkdmabuf.c
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@ -459,6 +459,8 @@ gdk_dmabuf_direct_downloader_do_download (GdkTexture *texture,
g_warning ("Failed to seek dmabuf: %s", g_strerror (errno));
goto out;
}
/* be a good citizen and seek back to the start, as the dos recommend */
lseek (dmabuf->planes[i].fd, 0, SEEK_SET);
if (ioctl (dmabuf->planes[i].fd, DMA_BUF_IOCTL_SYNC, &(struct dma_buf_sync) { DMA_BUF_SYNC_START|DMA_BUF_SYNC_READ }) < 0)
g_warning ("Failed to sync dmabuf: %s", g_strerror (errno));