linux-kernel - Re: Bug#757733: RTS2557 SD card reader does not work

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Date:	Mon, 11 Aug 2014 00:58:08 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Wei WANG <wei_wang@...lsil.com.cn>
Cc:	Philipp Hagemeister <phihag@...hag.de>, 757733@...s.debian.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Bug#757733: RTS2557 SD card reader does not work

On Mon, 2014-08-11 at 00:50 +0200, Philipp Hagemeister wrote:
> Package: src:linux
> Version: 3.16-1~exp1
> Severity: normal
> 
> Dear Maintainer,
> 
> I have a Lenovo Thinkpad T440s with an included SD card reader for which
> /dev/mmc* devices do not show up. It seems to be an RTS 2557:
> 
> $ lspci -v | grep RTS
> 02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI
> Express Card Reader (rev 01)
> 
> With linux-image-3.14-2-amd64 (unstable) as well as 3.16-trunk-
> amd64(experimental), there are no /dev/mmc* devices (or in fact, any new
> devices) after inserting an SD card (which works fine on another reader). dmesg
> shows this error:
> 
> $ dmesg  | grep rtsx_pci
> [    0.881602] rtsx_pci 0000:02:00.0: irq 57 for MSI/MSI-X
> [    0.881619] rtsx_pci 0000:02:00.0: rtsx_pci_acquire_irq: pcr->msi_en = 1,
> pci->irq = 57
> [    0.980400] rtsx_pci: probe of 0000:02:00.0 failed with error -110
> 
> This error shows up at boot time. There are no new dmesg (or syslog) outputs
> upon inserting the SD card.

A web search shows some similar reports (e.g.
<https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1329566>,
<http://askubuntu.com/questions/473848/ubuntu-14-04-realtek-semiconductor-co-ltd-rts5227-pci-express-card-reader-isn>).
But in that last one, it turns out that the out-of-tree driver does
work.

Is there anything Philipp can do (e.g. debugging options) to help get
this fixed?

Ben.

-- 
Ben Hutchings
Humans are not rational beings; they are rationalising beings.

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