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Received: from relay8-d.mail.gandi.net ([217.70.183.201]) by merlin.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1goUre-0002Jf-LO for linux-arm-kernel@lists.infradead.org; Tue, 29 Jan 2019 14:59:52 +0000 X-Originating-IP: 90.88.147.226 Received: from windsurf (aaubervilliers-681-1-27-226.w90-88.abo.wanadoo.fr [90.88.147.226]) (Authenticated sender: thomas.petazzoni@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id C84841BF20D; Tue, 29 Jan 2019 14:59:14 +0000 (UTC) Date: Tue, 29 Jan 2019 15:59:13 +0100 From: Thomas Petazzoni To: Leigh Brown Subject: Re: Out-of-tree mwlwifi driver crashes Message-ID: <20190129155913.163f1e98@windsurf> In-Reply-To: <01e409217be1c1cb08ac3bab072fccd3@solinno.co.uk> References: <01e409217be1c1cb08ac3bab072fccd3@solinno.co.uk> Organization: Bootlin X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190129_095950_806228_0AF975D2 X-CRM114-Status: GOOD ( 19.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello Leigh, On Tue, 29 Jan 2019 13:47:38 +0000 Leigh Brown wrote: > The following commit causes the out-of-tree mwlwifi driver [1] to crash, > which > I have found with git bisect. > > commit 1f08673eef1236f7d02d93fcf596bb8531ef0d12 > Author: Thomas Petazzoni > Date: Thu Oct 18 17:37:18 2018 +0200 > > PCI: mvebu: Convert to PCI emulated bridge config space > > Convert the pci-mvebu driver to use the pci-bridge-emul logic, that > helps emulating a root port PCI bridge configuration space. > > Signed-off-by: Thomas Petazzoni > [lorenzo.pieralisi@arm.com: updated commit log] > Signed-off-by: Lorenzo Pieralisi > > I have raised the issue with the driver maintainers but they responded > that > this is a kernel regression [2]. > > Do you think this is a driver issue or a regression? I am happy to test > proposed > fixes but I don't understand enough about the driver or PCI to > investigate. > > If I revert that single commit, the issue goes away. Thanks a lot for this report. This is the second report related to this commit. I already started investigating, but didn't dedicate enough time to find a proper fix yet. Could you share the output of "lspci -vvv -xxx" with the commit applied and reverted ? Thanks! Thomas -- Thomas Petazzoni, CTO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel