Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752831AbdHIODc (ORCPT ); Wed, 9 Aug 2017 10:03:32 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:42648 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752756AbdHIOD3 (ORCPT ); Wed, 9 Aug 2017 10:03:29 -0400 Date: Wed, 9 Aug 2017 10:03:27 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: "Gustavo A. R. Silva" cc: Greg Kroah-Hartman , , , Subject: Re: [PATCH] usb: ehci-omap: fix error return code in ehci_hcd_omap_probe() In-Reply-To: <20170808222613.GA4796@embeddedgus> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1301 Lines: 35 On Tue, 8 Aug 2017, Gustavo A. R. Silva wrote: > platform_get_irq() returns an error code, but the ehci-omap driver > ignores it and always returns -ENODEV. This is not correct and, > prevents -EPROBE_DEFER from being propagated properly. > > Also, notice that platform_get_irq() no longer returns 0 on error: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af > > Print and propagate the return value of platform_get_irq on failure. > > This issue was detected with the help of Coccinelle. > > Signed-off-by: Gustavo A. R. Silva > --- > drivers/usb/host/ehci-omap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c > index 94ea9ff..4d30853 100644 > --- a/drivers/usb/host/ehci-omap.c > +++ b/drivers/usb/host/ehci-omap.c > @@ -130,8 +130,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) > > irq = platform_get_irq(pdev, 0); > if (irq < 0) { > - dev_err(dev, "EHCI irq failed\n"); > - return -ENODEV; > + dev_err(dev, "EHCI irq failed: %d\n", irq); > + return irq; > } > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); Acked-by: Alan Stern