On Wed, Jan 22, 2014 at 12:32:39PM +0800, Chris Ruehl wrote:
> Function mxcmci_request() throw an exception on a imx27 cpu.
> This patch fix the problem by test the pointer before access it.
>
> diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
> index f7199c8..8645d6a 100644
> --- a/drivers/mmc/host/mxcmmc.c
> +++ b/drivers/mmc/host/mxcmmc.c
> @@ -347,7 +347,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host,
> struct mmc_data *data)
> return 0;
>
> for_each_sg(data->sg, sg, data->sg_len, i) {
> - if (sg->offset & 3 || sg->length & 3 || sg->length < 512) {
> + if (sg && (sg->offset & 3 || sg->length & 3 || sg->length <
> 512)) {
The question is why sg is NULL. I think this shouldn't happen.
Sascha
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