From 52fc3f5c807a580860a7dccfe321bd1bf065a292 Mon Sep 17 00:00:00 2001 From: William Wu Date: Tue, 21 Feb 2017 16:02:36 +0800 Subject: [PATCH] usb: core: hub: add quirk for hub with broken autosuspend function Some USB host controller seems to have problems with autosuspend. For example, Rockchip rk3328 SoC USB 3.0 wouldn't handle remote wakeup correctly with external hub after entered autosuspend, caused to resume SS port fail. This patch introduces a new quirk flag for hub that should remain disabled for autosuspend. Change-Id: I6d14222b2c5025583fea811a6afd6abd22f41cb9 Signed-off-by: William Wu --- drivers/usb/core/hub.c | 3 ++- include/linux/usb/quirks.h | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 00dd717e65bb..b9195e242cca 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1711,7 +1711,8 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id) * bus_resume methods. */ if (hdev->parent) { /* normal device */ - usb_enable_autosuspend(hdev); + if (!(hdev->parent->quirks & USB_QUIRK_AUTO_SUSPEND)) + usb_enable_autosuspend(hdev); } else { /* root hub */ const struct hc_driver *drv = bus_to_hcd(hdev->bus)->driver; diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h index 1d0043dc34e4..56939098675e 100644 --- a/include/linux/usb/quirks.h +++ b/include/linux/usb/quirks.h @@ -50,4 +50,7 @@ /* device can't handle Link Power Management */ #define USB_QUIRK_NO_LPM BIT(10) +/* device can't support auto suspend function */ +#define USB_QUIRK_AUTO_SUSPEND BIT(11) + #endif /* __LINUX_USB_QUIRKS_H */ -- 2.34.1