From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793097422; b=t2efpgvUXCBqGnpp3nAzgQYSpmFoyETvIdvw7CEfWk171JFSv6XXJ7P20KaR4OplHRWW YuD71kGH5W/IultN1sY9KodlVENVoQuikO4sGOOxrbWuS9IQyk8+niP8HMvfcmdow0l+O 0YuILbJQB/Amask+SliduHnLHkmZXgNbW5Uu7IrDv3P5du74ID0OhaOtaXBFo+q1tKPTV eBkZZOmLYHH8eQvzCCxZu6h0CFFIXedkZXOY9KfR5sVIUHIhNZierp7ww9tvLAsdbDzFG tdmwF4SiQqSjcnYJAGoHp8sRyV8d/D1dkxv5XuYW17ppnyBG8kNz8cEGra/CX3L+unw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793097422; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=ckYp1oZE/nINvTOKIarWFZT5ZHmdM6ZJXgA+bxu9+tk=; b=ED4xT0UCBjy4tCeMGBNZllCquI0NA704QBrzYz+QQM6Kj6o/tHdujUikCrErfgF8OFCp xyniFSDD7yRqFA0mkkPlnNEwhdo3ksOl2VQK4Oj9HowvKhkNJ1OY7IH/6WkEvAYQkKf4f RCGqwuslYx2EhADdNPez/1QkLj+ERDe5I6c9v7lcdZRO+VoHNR6/71HrCEXUShrqy6wSz tYdPHYP1vFAyy8LKsi9vxPZHf0hjO2PBnk1JRrnQZjPOtp0tLZe4w09OB4TqxHf5YVtl+ oxfiYCFWb9M3nq6FVqcG7M/2VGBdOErXRnoiejzem9pPCZxkfSSQaOZyAhYh/nlWgNg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=V45VRmxC; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B9B5A606A31B; Tue, 27 Oct 2026 10:37:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=V45VRmxC Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DF691F031E3; Tue, 27 Oct 2026 10:37:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793097421; bh=ckYp1oZE/nINvTOKIarWFZT5ZHmdM6ZJXgA+bxu9+tk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=V45VRmxCO2A19BOHLwd0g5vZlcK+Zg+DWrDPKwGWcAic9Kn8mcp4/lIszKcqIj38y 1vVzRSrmtO9tXDlfd+5e3khRq1OEOij+fhFDcOT9Hl+tmPP7D5IGDHjQ/qf8RUVfTl p03s9CiccD77PEkydEEtVtARqm84tFwIA6MH2Z8IIbeScuHY2h17rZPVTAmJg3pZwJ zi5vf7NOutMGXZvnRZRPmZMI+snKV+XbDgKqr8wjx1Ub5y9yydmyGx27PTCUXJXG3f tT1tQKjDYm8JYIozoSh1eQ3uLxIE6AhCwAio++BAe8980gyhQrk0XHvJe7qLExhxjH TGHbxTYgj61tA== From: Lee Jones To: lee@kernel.org, Ming Yu , mfd@lists.linux.dev, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Subject: [PATCH v2 08/27] mfd: nct6694: Do not resubmit interrupt URB on endpoint stall (-EPIPE) Date: Tue, 27 Oct 2026 09:30:37 +0000 Message-ID: <20261027093306.2812695-9-lee@kernel.org> X-Mailer: git-send-email 2.56.0.307.g5fe7bd680c-goog In-Reply-To: <20261027093306.2812695-1-lee@kernel.org> References: <20261027093306.2812695-1-lee@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit If the USB interrupt IN endpoint stalls (-EPIPE), usb_int_callback() falls through to the default case and immediately resubmits the URB from atomic completion context. Because a stalled endpoint completes newly submitted URBs immediately with -EPIPE, this triggers a tight infinite resubmission loop. Treat -EPIPE as a terminal URB status in usb_int_callback() alongside the existing teardown status codes, matching other USB MFD drivers. Fixes: 51dad33ede63 ("mfd: Add core driver for Nuvoton NCT6694") Closes: https://sashiko.dev/#/bug/linux-9d8d1902-140d-4559-b604-76ba76e778a2 Cc: stable@vger.kernel.org Signed-off-by: Lee Jones --- drivers/mfd/nct6694.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mfd/nct6694.c b/drivers/mfd/nct6694.c index e2957e587d1b..40a29f8e0ff6 100644 --- a/drivers/mfd/nct6694.c +++ b/drivers/mfd/nct6694.c @@ -201,6 +201,7 @@ static void usb_int_callback(struct urb *urb) break; case -ECONNRESET: case -ENOENT: + case -EPIPE: case -ESHUTDOWN: return; default: -- 2.56.0.307.g5fe7bd680c-goog