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=1792584888; b=kcxJEWLfzd1/wy3cNYAG3rqksnZOSkJlwLf4kf7RTgeSWn9MjFUd7xTzsL9YL88QEf3a U+u+jiL0NnNoCK5tqQwy+moIXDaN6nRulbW9HKiDZe8ieDZyElFcd48aF4T2JwcE17vuq H0beteDxpiF2MzoXQcqWqgsgw7d8XCPI+Bl25LTI3cS0NUdba5pxVwddl+x5hgKzs8XcB y21g7FRxqt5iaHQG/ydbycRbQopbTjf0bDHht/QGDrZtFYX+cz9MkdIt3PwXDq+Dyqr1t pQzjaYlCC5moiBQ1ehu4uiJxGCmLycS7MfZ5kQuVlhfYxugvmSQfeJ+2hQ+TZRNJ9+w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792584888; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=S9BWyTKFqPfO+V5O5DmNko7gL56NdP2ZVImcVs8PdHM=; b=ERr5Ee6O6jgstuhmGQMitXOZOtmFk2VXdeX3as4YFwGtWg5rpS+/HjMrjwQgAb10avBy ORTaJMlfkV0Dw+riav+FWaUa/V2bkm2bI6cvvBibh+QS+1msDQds7JUnJjM8D1fdQa0kb fP8rwatLn3akEWBnqzb05K0828s5mOSbMsTr9oTcTOYgEQIlyPYOCFTdySyfqRnyLbfJJ pHexEU7ZqbrM40Gs+rmwWIqfnRI5fiMzzQLTcMCucfzKrhTyJQtXAO0r27D0cbFYNxv9z V9Na4zbiFd3O1XDHPVfD0qDhdHJ3VlkxEjLTnRYOTclQK+BGKrBqvNBRCWD5JsXrf7Q== 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="T/JlXOhy"; 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 38B84606A31E; Wed, 21 Oct 2026 12:14:48 +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=T/JlXOhy Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A0AE1F000C4; Wed, 21 Oct 2026 12:14:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792584888; bh=S9BWyTKFqPfO+V5O5DmNko7gL56NdP2ZVImcVs8PdHM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=T/JlXOhyflSabvmEL56r3sUhB4uK5sNufsCIRff10Ag5oAF8zmifjnuMqLAJr6z6b /mS/rYzI73s2mg6apIcpy8e+NvKKFoWY8UWfjneo/jTDls4XXRN0bsksAgiQc65UOq HXENOy48cFMksJ76uiooVIrwpIIp6AriqxpEM3osFEEOtM76Lj54QaAd/RjmxW7OCo 4W/a2gmLfGOhl831PuTqwP1tVCHUMuX+QMQIbFW0GsOboRx/4acYpHJrpE6Za/VM9M 1f/yBpxVviKgJVRsDEsaEkk+4z2as9QlenEBfLdfedIY3muCl992hM64WBuIxPxMtd 1EJersBgGg9cQ== 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 08/28] mfd: nct6694: Do not resubmit interrupt URB on endpoint stall (-EPIPE) Date: Wed, 21 Oct 2026 12:09:30 +0000 Message-ID: <20261021121245.3111563-8-lee@kernel.org> X-Mailer: git-send-email 2.56.0.218.g1ec904b173-goog In-Reply-To: <20261021121245.3111563-1-lee@kernel.org> References: <20261021121245.3111563-1-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: -- 2.56.0.218.g1ec904b173-goog