From: Kai-Heng Feng kai.heng.feng@canonical.com
commit 1902a01e2bcc3abd7c9a18dc05e78c7ab4a53c54 upstream.
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 Acked-by: Alan Stern stern@rowland.harvard.edu Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20190827173450.13572-2-kai.heng.feng@canonical.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/storage/realtek_cr.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
--- a/drivers/usb/storage/realtek_cr.c +++ b/drivers/usb/storage/realtek_cr.c @@ -1009,12 +1009,15 @@ static int init_realtek_cr(struct us_dat 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)