Hi Wolfram, On Mon, Jul 3, 2017 at 9:28 PM, Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote: > I always anticipated this code to be not correct, but now I had a test > case to prove it. According to all documentation I have, setting the > TMIO_STOP_STP bit ever only worked during block transfers. This bit is > like manually enforcing an autocmd12 during a so far seamless transfer. > It does NOT work when the block transfer had errors. It also does NOT > work with any other cmd except block commands. For all those, CMD12 has > to be treated like any other command. So, basically, we could use this > bit only for mrq->data->stop cmds. But for these, we happily use the > autocmd12 feature using the TMIO_STOP_SEC bit. As a result, the above > bit is not useful for us and we need to treat CMD12 as a regular cmd > always. Just remove the special handling code. Note that the BSP > recognized this issue as well yet had a more cautious solution to the > problem [1]. Which is understandable but makes CMD12 handling even more > complicated. > > Checked with a Renesas Salvator-X/M3-W which needed to send CMD12 when > retuning one of my SD cards. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/commit/?id=2838a2ff8ca776f6d18b7fbbe75f3df8dd64183a > > Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> > --- > > So, this is a friendly call for further testing to make sure no regressions > happen. I also put the authors of the BSP patch to CC to check if this patch > also matches their use case. I hope this is fine for these people, please > accept my apologies if not. I just really like to have your opinion on this > patch. > > Geert, Simon: any chance you can run this patch on your board farms? I've booted all my boards with your patch applied, no visible differences. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
