linux-kernel - Re: [PATCH] bus: mhi: host: pci

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Z0yaTpOOml1VisXb@hovoldconsulting.com>
Date: Sun, 1 Dec 2024 18:18:06 +0100
From: Johan Hovold <johan@...nel.org>
To: regressions@...ts.linux.dev
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Mayank Rana <quic_mrana@...cinc.com>
Subject: Re: [PATCH] bus: mhi: host: pci_generic: fix MHI BAR mapping

[ Forgot to CC the regressions list ]

On Sun, Dec 01, 2024 at 06:11:20PM +0100, Johan Hovold wrote:
> A recent change converting the MHI pci_generic driver to use
> pcim_iomap_region() failed to update the BAR parameter which is an index
> rather than a mask.
> 
> This specifically broke the modem on machines like the Lenovo ThinkPad
> X13s and x1e80100 CRD:
> 
> 	mhi-pci-generic 0004:01:00.0: failed to map pci region: -22
> 	mhi-pci-generic 0004:01:00.0: probe with driver mhi-pci-generic failed with error -22
> 
> Fixes: bd23e836423e ("bus: mhi: host: pci_generic: Use pcim_iomap_region() to request and map MHI BAR")
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Cc: Mayank Rana <quic_mrana@...cinc.com>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
> 
> The offending patch was marked as "Compile tested only", but that just
> makes you wonder *why* the patch was never tested...
> 
> 	https://lore.kernel.org/all/20241004023351.6946-1-manivannan.sadhasivam@linaro.org/
 
#regzbot ^introduced: bd23e836423e

Johan