linux-kernel - [PATCH 4.9 16/66] usb: gadget: configfs: clear deactivation flag in configfs_composite

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Message-Id: <20220510130730.241763536@linuxfoundation.org>
Date:   Tue, 10 May 2022 15:07:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Vijayavardhan Vennapusa <vvreddy@...eaurora.org>,
        Dan Vacura <w36195@...orola.com>, stable <stable@...nel.org>
Subject: [PATCH 4.9 16/66] usb: gadget: configfs: clear deactivation flag in configfs_composite_unbind()

From: Vijayavardhan Vennapusa <vvreddy@...eaurora.org>

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@...eaurora.org>
Signed-off-by: Dan Vacura <w36195@...orola.com>
Cc: stable <stable@...nel.org>
Link: https://lore.kernel.org/r/20220413211038.72797-1-w36195@motorola.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/gadget/configfs.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1409,6 +1409,8 @@ static void configfs_composite_unbind(st
 	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);
 }