>> Is there some reason this whole thing isn't just >> >> seq_write(m, drm->vbios.data, drm->vbios.length) … > I don't know if my answer is relevant or not here but: > for () seq_putc(); ==> will fill 'm' with everything that fits in I find such a discussion approach strange. > and > seq_write() ==> is all or nothing. So if 'm' is too small, then nothing will be appended. The clarification can become more interesting for this system detail. https://elixir.bootlin.com/linux/v6.10/source/fs/seq_file.c#L816 Was the sequence size (or the file capacity) appropriately configured? Regards, Markus