On 02/09/2012 11:55 AM, ludovic.desroches@xxxxxxxxx :
> From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
>
> Sometimes a software reset is needed. Then some registers are saved and
> restored but the interrupt mask register is missing. It causes issues
> with sdio devices whose interrupts are masked after reset.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Chris, can you please queue this patch in a "fixes" branch?
Thanks, best regards,
> Cc: stable@xxxxxxxxxxxxxxx
> ---
> drivers/mmc/host/atmel-mci.c | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 09ac13b..dfa5dd9 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -965,11 +965,14 @@ static void atmci_start_request(struct atmel_mci *host,
> host->data_status = 0;
>
> if (host->need_reset) {
> + iflags = atmci_readl(host, ATMCI_IMR);
> + iflags &= (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB);
> atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST);
> atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN);
> atmci_writel(host, ATMCI_MR, host->mode_reg);
> if (host->caps.has_cfg_reg)
> atmci_writel(host, ATMCI_CFG, host->cfg_reg);
> + atmci_writel(host, ATMCI_IER, iflags);
> host->need_reset = false;
> }
> atmci_writel(host, ATMCI_SDCR, slot->sdc_reg);
--
Nicolas Ferre
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