linux-kernel - [PATCH v2 2/3] usb: raw-gadget: don't disable device if usb_ep

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Message-Id: <3c5df3dddb67623b4aeb11c5546370363e65d8e2.1698350424.git.andreyknvl@gmail.com>
Date:   Thu, 26 Oct 2023 22:01:13 +0200
From:   andrey.konovalov@...ux.dev
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Felipe Balbi <balbi@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/3] usb: raw-gadget: don't disable device if usb_ep_queue fails

From: Andrey Konovalov <andreyknvl@...il.com>

During device operation, the host might decide to reset a device emulated
via Raw Gadget. In this case, if the device emulation code has endpoint
requests queued, usb_ep_queue will fail with -ESHUTDOWN. Currently, this
disables the Raw Gadget device and makes the emulation code unable to
proceed.

Do not disable the Raw Gadget device if usb_ep_queue fails.

Signed-off-by: Andrey Konovalov <andreyknvl@...il.com>
---
 drivers/usb/gadget/legacy/raw_gadget.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
index ce9e87f84911..daac1f078516 100644
--- a/drivers/usb/gadget/legacy/raw_gadget.c
+++ b/drivers/usb/gadget/legacy/raw_gadget.c
@@ -693,7 +693,6 @@ static int raw_process_ep0_io(struct raw_dev *dev, struct usb_raw_ep_io *io,
 		dev_err(&dev->gadget->dev,
 				"fail, usb_ep_queue returned %d\n", ret);
 		spin_lock_irqsave(&dev->lock, flags);
-		dev->state = STATE_DEV_FAILED;
 		goto out_queue_failed;
 	}
 
@@ -1080,7 +1079,6 @@ static int raw_process_ep_io(struct raw_dev *dev, struct usb_raw_ep_io *io,
 		dev_err(&dev->gadget->dev,
 				"fail, usb_ep_queue returned %d\n", ret);
 		spin_lock_irqsave(&dev->lock, flags);
-		dev->state = STATE_DEV_FAILED;
 		goto out_queue_failed;
 	}
 
-- 
2.25.1