From patchwork Wed Nov 2 16:15:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sven Peter X-Patchwork-Id: 13028577 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DDE5C4167D for ; Wed, 2 Nov 2022 16:22:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231495AbiKBQWn (ORCPT ); Wed, 2 Nov 2022 12:22:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232068AbiKBQWX (ORCPT ); Wed, 2 Nov 2022 12:22:23 -0400 Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8FC0326FA; Wed, 2 Nov 2022 09:16:06 -0700 (PDT) Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.west.internal (Postfix) with ESMTP id AEF2432005C1; Wed, 2 Nov 2022 12:16:03 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Wed, 02 Nov 2022 12:16:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=cc:cc:content-transfer-encoding:date:date:from:from :in-reply-to:message-id:mime-version:reply-to:sender:subject :subject:to:to; s=fm3; t=1667405763; x=1667492163; bh=vjsW9AucU8 8T88HijQ2DrXg0E5k9G26I+ZgoZYsnzAI=; b=p7Be0evCxVzL9WsdOQE4XYZ+IN fE/97l2ihtQ1rXMk4iqSOBAq8BsukeckaHXigDSbz1F+xQ4OJ7M7BzRNJHOz4i1f Rg5pUXmQ0h+luQXk5iDZuwHt9OJkSE9tEEWf8pktnQ0oDTjsd219fJWQtwXOmfly VxUXn8GoEVjahMbW5xheoI8mKp8uSLr5SSDmmNFvjmN1OCvTUM6hqEoo8XG7V4AU TpkzIq4kRYvw641pcjFf/LFT94vpOcFPuex2rXseTYaP5FxcsjaVTxPDpf2EUffI CFzEEW4VnitwTwsDbn3ELwGo/n2CHSe+NgOJ3xfuHKQRk97ry3vzx+vAPUvg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:message-id :mime-version:reply-to:sender:subject:subject:to:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; t= 1667405763; x=1667492163; bh=vjsW9AucU88T88HijQ2DrXg0E5k9G26I+Zg oZYsnzAI=; b=tJYHxDZW6rW4pPnCLpsIta4NrRsfO1HsHdhpmYM7x39dx1b9V34 ube4P7qlGDjt3p3xx0FlTOamj8PoQ7GzpWEMiBe+Yy3Xdbb5Omb8mKZ20+3sjz8y XTHTFX9/wdwsTJn7jZHTd94PCGyvidlwa/YwVJQBItyFfqVNU6tqHHh8jL9YhLGa /hoAsCKKsEGhlyV1uO5nmLQGlph7I0/Co9d24rHaWSqhWa7G5Lx7964B24s8vdXO iw2V2n/fSt3ZQwafBaxq3hmAUZShG7tC68SlSeNWovBusHZutNAQvWNt3eTbYBG3 Rg6LscQAoyVvh2HO86Q/7q8Dm5mbOqDInVw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvgedrudejgdekhecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvfevufffkffoggfgsedtkeertdertddtnecuhfhrohhmpefuvhgvnhcurfgv thgvrhcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrfgrthhtvghrnh epleduffeiheeuvedtffevtdeuleeljeduudfgtedtvefhfeffvdfghfejhefgleelnecu vehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepshhvvghnse hsvhgvnhhpvghtvghrrdguvghv X-ME-Proxy: Feedback-ID: i51094778:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 2 Nov 2022 12:16:01 -0400 (EDT) From: Sven Peter To: Heikki Krogerus , Greg Kroah-Hartman Cc: Sven Peter , Hector Martin , =?utf-8?q?Guido_G=C3=BCnther?= , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, asahi@lists.linux.dev Subject: [PATCH] usb: typec: tipd: Prevent uninitialized event{1,2} in IRQ handler Date: Wed, 2 Nov 2022 17:15:42 +0100 Message-Id: <20221102161542.30669-1-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If reading TPS_REG_INT_EVENT1/2 fails in the interrupt handler event1 and event2 may be uninitialized when they are used to determine IRQ_HANDLED vs. IRQ_NONE in the error path. Fixes: c7260e29dd20 ("usb: typec: tipd: Add short-circuit for no irqs") Fixes: 45188f27b3d0 ("usb: typec: tipd: Add support for Apple CD321X") Signed-off-by: Sven Peter Reviewed-by: Eric Curtin Reviewed-by: Guido Günther Reviewed-by: Heikki Krogerus --- drivers/usb/typec/tipd/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c index b637e8b378b3..2a77bab948f5 100644 --- a/drivers/usb/typec/tipd/core.c +++ b/drivers/usb/typec/tipd/core.c @@ -474,7 +474,7 @@ static void tps6598x_handle_plug_event(struct tps6598x *tps, u32 status) static irqreturn_t cd321x_interrupt(int irq, void *data) { struct tps6598x *tps = data; - u64 event; + u64 event = 0; u32 status; int ret; @@ -519,8 +519,8 @@ static irqreturn_t cd321x_interrupt(int irq, void *data) static irqreturn_t tps6598x_interrupt(int irq, void *data) { struct tps6598x *tps = data; - u64 event1; - u64 event2; + u64 event1 = 0; + u64 event2 = 0; u32 status; int ret;