From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAADDA92E for ; Sat, 18 Oct 2025 00:29:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760747370; cv=none; b=WNTu140TO3rPG3bQkLXgv+8ifcsGBEe2IduOq2Kfq4A2PRUv09gPvern+JbLWqljeNJREz8XfnxsS5Psdv5whESSGHL6LRsLb/rauvNE1BkR4EusLyqIVN5s47EmrXCYe3a5hwoomfhrksMTEIF8yewY3lDHUVxV5ydHtSR1uQo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760747370; c=relaxed/simple; bh=Mc4xkfuy4abnAYTEEZEJyq6LL44a+i1TrvOp/gepJr0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kPsarKQ011BqpTyAIqJoghAOkLzAcv00m8nuOMcHwPfiNGfT8zhZVQE3Akc3glPaHs9dr8BlH1UsCTKv2YoA8NTv6JjXf0A7XaqoiEJwAFNaCRk6cyYTRu7QDjVatNWk3AxxcEFe7XGTVgL1JC4p5GFnx8M9IjLNGn+Kr8Qmojs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BxASoWbp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BxASoWbp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9ADA4C4CEE7; Sat, 18 Oct 2025 00:29:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760747370; bh=Mc4xkfuy4abnAYTEEZEJyq6LL44a+i1TrvOp/gepJr0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BxASoWbpaWGWOs6QPh9Ow9hx4Hc7YRrnMXOAWsoouhYvggugKjpk9c2hZL+dlgZhD /X8rRg6cNmf1lPVk1TDWc+35YsK+ItYDhzBjP9AdBUfoGoypNj/YfsVhQz9DqSldy2 l02YyNjcJMaM2CVOTsCpBInfrPlVJNxEBh6jcbLsPz/xJ8P0z/EMx7RwqSQDaDbMgC 1QTUP6Tudpbmi2KlKqnbGzWzHUS5cZ+JW5cYIYmMwzjCTBtTjyBjORiPkf1tXokI+E Wapdhp7SV56ODJBY8B78NJExBsfJ+LJBgyXQXtoOpLPsONmomprCXwrx0awkBELVB1 WTKStns2qOolQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Kuen-Han Tsai , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH 6.12.y 1/3] usb: gadget: Store endpoint pointer in usb_request Date: Fri, 17 Oct 2025 20:29:25 -0400 Message-ID: <20251018002927.85194-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2025101617-overbook-seventeen-a027@gregkh> References: <2025101617-overbook-seventeen-a027@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Kuen-Han Tsai [ Upstream commit bfb1d99d969fe3b892db30848aeebfa19d21f57f ] Gadget function drivers often have goto-based error handling in their bind paths, which can be bug-prone. Refactoring these paths to use __free() scope-based cleanup is desirable, but currently blocked. The blocker is that usb_ep_free_request(ep, req) requires two parameters, while the __free() mechanism can only pass a pointer to the request itself. Store an endpoint pointer in the struct usb_request. The pointer is populated centrally in usb_ep_alloc_request() on every successful allocation, making the request object self-contained. Signed-off-by: Kuen-Han Tsai Link: https://lore.kernel.org/r/20250916-ready-v1-1-4997bf277548@google.com Signed-off-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20250916-ready-v1-1-4997bf277548@google.com Stable-dep-of: 47b2116e54b4 ("usb: gadget: f_acm: Refactor bind path to use __free()") Signed-off-by: Sasha Levin --- drivers/usb/gadget/udc/core.c | 3 +++ include/linux/usb/gadget.h | 2 ++ 2 files changed, 5 insertions(+) diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index d709e24c1fd42..e3d63b8fa0f4c 100644 --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -194,6 +194,9 @@ struct usb_request *usb_ep_alloc_request(struct usb_ep *ep, req = ep->ops->alloc_request(ep, gfp_flags); + if (req) + req->ep = ep; + trace_usb_ep_alloc_request(ep, req, req ? 0 : -ENOMEM); return req; diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index df33333650a0d..77554f4446651 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -32,6 +32,7 @@ struct usb_ep; /** * struct usb_request - describes one i/o request + * @ep: The associated endpoint set by usb_ep_alloc_request(). * @buf: Buffer used for data. Always provide this; some controllers * only use PIO, or don't use DMA for some endpoints. * @dma: DMA address corresponding to 'buf'. If you don't set this @@ -98,6 +99,7 @@ struct usb_ep; */ struct usb_request { + struct usb_ep *ep; void *buf; unsigned length; dma_addr_t dma; -- 2.51.0