Hi John,
On Thu, Apr 07 2011, John Calixto wrote:
> Sending ACMDs from userspace is useful for such things as:
>
> - The security application of an SD card (SD Specification, Part 3,
> Security)
>
> - SD passthrough for virtual machines
>
> Tested on TI PCIxx12 (SDHCI), Sigma Designs SMP8652 SoC, TI OMAP3621
> SoC, TI OMAP3630 SoC, Samsung S5PC110 SoC, Qualcomm MSM7200A SoC.
>
> Signed-off-by: John Calixto <john.calixto@xxxxxxxxxxxxxx>
This adds two gcc warnings here (compiling for ARM):
CC drivers/mmc/card/block.o
drivers/mmc/card/block.c: In function âmmc_blk_ioctl_copy_from_userâ:
drivers/mmc/card/block.c:199:33: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
drivers/mmc/card/block.c: In function âmmc_blk_ioctl_acmdâ:
drivers/mmc/card/block.c:308:20: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
...
> + if (copy_from_user(idata->buf, (u8 *) user->data_ptr, idata->buf_bytes)) {
> + err = -EFAULT;
> + goto copy_err;
> + }
...
> + if (copy_to_user((u8 *) ic_ptr->data_ptr, idata->buf, idata->buf_bytes)) {
> + err = -EFAULT;
> + goto acmd_rel_host;
> + }
...
Thanks,
- Chris.
--
Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/>
One Laptop Per Child
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