Re: 回复: 回复: 回复: backport a patch for Linux kernel-5.15 kernel-6.1 kenrel-6.6 stable tree

Greg KH
2024-05-24T04:08:50Z

On Fri, May 24, 2024 at 01:07:18AM +0000, Lin Gui (桂林) wrote:
> Dear @Greg KH<mailto:gregkh@linuxfoundation.org>,
>
> Base : kernel-5.15.159
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index a569066..d656964 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -1800,7 +1800,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
> if (err)
> goto free_card;
>
> - } else if (!mmc_card_hs400es(card)) {
> + } else if (mmc_card_hs400es(card)){
> + if (host->ops->execute_hs400_tuning) {
> + err = host->ops->execute_hs400_tuning(host, card);
> + if (err)
> + goto free_card;
> + }
> + } else {
> /* Select the desired bus width optionally */
> err = mmc_select_bus_width(card);
> if (err > 0 && mmc_card_hs(card)) {
>

Also, please read:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.