Re: [PATCH] mfd:rtsx: Fix issue that booting OS with SD card inserted

From: Samuel Ortiz
Date: Fri Feb 08 2013 - 14:33:15 EST

Hi Wei,

On Fri, Feb 08, 2013 at 03:24:27PM +0800, wei_wang@xxxxxxxxxxxxxx wrote:
> From: Wei WANG <wei_wang@xxxxxxxxxxxxxx>
> Realtek card reader supports both SD and MS card. According to the
> settings of rtsx MFD driver, SD host will be probed before MS host.
> If we boot/reboot Linux with SD card inserted, the resetting flow of SD
> card will succeed, and the following resetting flow of MS is sure to fail.
> Then MS upper-level driver will ask rtsx driver to turn power off. This
> request leads to the result that the following SD commands fail and SD card
> can't be accessed again.
> In this commit, Realtek's SD and MS host driver will check whether the card
> that upper driver requesting is the one existing in the slot. If not, Realtek's
> host driver will refuse the operation to make sure the exlusive accessing
> at the same time.
> Signed-off-by: Wei WANG <wei_wang@xxxxxxxxxxxxxx>
> ---
> drivers/memstick/host/rtsx_pci_ms.c | 7 +++++++
> drivers/mfd/rtsx_pcr.c | 30 ++++++++++++++++++++++++++++++
> drivers/mmc/host/rtsx_pci_sdmmc.c | 18 ++++++++++++++++++
> include/linux/mfd/rtsx_pci.h | 2 ++
> 4 files changed, 57 insertions(+)
Patch applied, thanks.


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