From patchwork Tue Feb 15 20:09:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Shtylyov X-Patchwork-Id: 12747596 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 BB62FC433EF for ; Tue, 15 Feb 2022 20:09:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237305AbiBOUJi (ORCPT ); Tue, 15 Feb 2022 15:09:38 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:44068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229747AbiBOUJh (ORCPT ); Tue, 15 Feb 2022 15:09:37 -0500 Received: from mxout03.lancloud.ru (mxout03.lancloud.ru [45.84.86.113]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A59AB10A6 for ; Tue, 15 Feb 2022 12:09:25 -0800 (PST) Received: from LanCloud DKIM-Filter: OpenDKIM Filter v2.11.0 mxout03.lancloud.ru 2442F2061799 Received: from LanCloud Received: from LanCloud Received: from LanCloud From: Sergey Shtylyov Subject: [PATCH] usb: host: xhci: make 'usec' parameter of xhci_handshake() *unsigned* To: Mathias Nyman , , "Greg Kroah-Hartman" Organization: Open Mobile Platform Message-ID: Date: Tue, 15 Feb 2022 23:09:21 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 Content-Language: en-US X-Originating-IP: [192.168.11.198] X-ClientProxiedBy: LFEXT01.lancloud.ru (fd00:f066::141) To LFEX1907.lancloud.ru (fd00:f066::207) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The negative timeouts hardly make sense, and the 'usec' parameter of xhci_handshake() gets assigned to a 'u64' typed local variable in readl_poll_timeout_atomic() anyways... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool. Signed-off-by: Sergey Shtylyov --- This patch is against the 'usb-next' branch of Greg KH's 'usb.git' repo. drivers/usb/host/xhci.c | 2 +- drivers/usb/host/xhci.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) Index: usb/drivers/usb/host/xhci.c =================================================================== --- usb.orig/drivers/usb/host/xhci.c +++ usb/drivers/usb/host/xhci.c @@ -65,7 +65,7 @@ static bool td_on_ring(struct xhci_td *t * handshake done). There are two failure modes: "usec" have passed (major * hardware flakeout), or the register reads as all-ones (hardware removed). */ -int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, int usec) +int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, unsigned int usec) { u32 result; int ret; Index: usb/drivers/usb/host/xhci.h =================================================================== --- usb.orig/drivers/usb/host/xhci.h +++ usb/drivers/usb/host/xhci.h @@ -2083,7 +2083,7 @@ void xhci_free_container_ctx(struct xhci /* xHCI host controller glue */ typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *); -int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, int usec); +int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, unsigned int usec); void xhci_quiesce(struct xhci_hcd *xhci); int xhci_halt(struct xhci_hcd *xhci); int xhci_start(struct xhci_hcd *xhci);