From: Vijayavardhan Vennapusa vvreddy@codeaurora.org
stable inclusion from stable-v5.10.114 commit 4dd5feb27939197d6a9fd5661fdd15315bc126c1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5IY1V
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit bf95c4d4630c7a2c16e7b424fdea5177d9ce0864 upstream.
If any function like UVC is deactivating gadget as part of composition switch which results in not calling pullup enablement, it is not getting enabled after switch to new composition due to this deactivation flag not cleared. This results in USB enumeration not happening after switch to new USB composition. Hence clear deactivation flag inside gadget structure in configfs_composite_unbind() before switch to new USB composition.
Signed-off-by: Vijayavardhan Vennapusa vvreddy@codeaurora.org Signed-off-by: Dan Vacura w36195@motorola.com Cc: stable stable@kernel.org Link: https://lore.kernel.org/r/20220413211038.72797-1-w36195@motorola.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- drivers/usb/gadget/configfs.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 9b7fa53d6642..d51ea1c052f2 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -1443,6 +1443,8 @@ static void configfs_composite_unbind(struct usb_gadget *gadget) usb_ep_autoconfig_reset(cdev->gadget); spin_lock_irqsave(&gi->spinlock, flags); cdev->gadget = NULL; + cdev->deactivations = 0; + gadget->deactivated = false; set_gadget_data(gadget, NULL); spin_unlock_irqrestore(&gi->spinlock, flags); }