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SubjectRe: [PATCH v3 2/2] USB: storage: ums-realtek: Whitelist auto-delink support
On Wed, 28 Aug 2019, Kai-Heng Feng wrote:

> Auto-delink requires writing special registers to ums-realtek devices.
> Unconditionally enable auto-delink may break newer devices.
>
> So only enable auto-delink by default for the original three IDs,
> 0x0138, 0x0158 and 0x0159.
>
> Realtek is working on a patch to properly support auto-delink for other
> IDs.
>
> BugLink: https://bugs.launchpad.net/bugs/1838886
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> v3:
> - Whitelisting instead of adding new module parameter.
> v2:
> - Use auto_delink_support instead of auto_delink_enable.
>
> drivers/usb/storage/realtek_cr.c | 13 ++++++++-----
> 1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
> index beaffac805af..1d9ce9cbc831 100644
> --- a/drivers/usb/storage/realtek_cr.c
> +++ b/drivers/usb/storage/realtek_cr.c
> @@ -996,12 +996,15 @@ static int init_realtek_cr(struct us_data *us)
> goto INIT_FAIL;
> }
>
> - if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
> - CHECK_FW_VER(chip, 0x5901))
> - SET_AUTO_DELINK(chip);
> - if (STATUS_LEN(chip) == 16) {
> - if (SUPPORT_AUTO_DELINK(chip))
> + if (CHECK_PID(chip, 0x0138) || CHECK_PID(chip, 0x0158) ||
> + CHECK_PID(chip, 0x0159)) {
> + if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
> + CHECK_FW_VER(chip, 0x5901))
> SET_AUTO_DELINK(chip);
> + if (STATUS_LEN(chip) == 16) {
> + if (SUPPORT_AUTO_DELINK(chip))
> + SET_AUTO_DELINK(chip);
> + }
> }
> #ifdef CONFIG_REALTEK_AUTOPM
> if (ss_en)

For both patches in this series:

Acked-by: Alan Stern <stern@rowland.harvard.edu>

Shouldn't this patch go into the -stable kernels as well?

Alan Stern

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