From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: * X-Spam-Status: No, score=1.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RDNS_NONE,SPF_HELO_NONE,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from verein.lst.de ([213.95.11.211]:59977 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729473AbgCKPYz (ORCPT ); Wed, 11 Mar 2020 11:24:55 -0400 Date: Wed, 11 Mar 2020 16:24:53 +0100 From: Christoph Hellwig To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , iommu@lists.linux-foundation.org, aros@gmx.com Subject: Re: [Bug 206175] Fedora >= 5.4 kernels instantly freeze on boot without producing any display output Message-ID: <20200311152453.GB23704@lst.de> References: <20200310162342.GA4483@lst.de> <20200310182546.GA9268@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200310182546.GA9268@lst.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: As you seem to have a mfd based usb card reader per bugzilla, can you try the patch form Robin below? This ensures mfd doesn't mess with the dma mask and thus entangling it with the parent. And please try to reply to the actual mail. I found some updates in bugzilla when I checked it after I haven't seen any reply for a while, but that isn't a very efficient way to communicate. --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -138,7 +138,7 @@ static int mfd_add_device(struct device *parent, int id, pdev->dev.parent = parent; pdev->dev.type = &mfd_dev_type; - pdev->dev.dma_mask = parent->dma_mask; + pdev->dma_mask = parent->dma_mask ? *parent->dma_mask : 0; pdev->dev.dma_parms = parent->dma_parms; pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;