[PATCH v2] staging: pi433: add mutex fixing concurrency issues.

[Dan Carpenter]

On Sat, Jun 09, 2018 at 11:48:42AM -0400, Hugo Lefeuvre wrote:
> case PI433_IOC_WR_TX_CFG:
>         if (copy_from_user(&instance->tx_cfg, argp,
>                    sizeof(struct pi433_tx_cfg)))
>             return -EFAULT;
>         break;

Btw, it looks so wrong to me that we copy partial data to
&instance->tx_cfg...  I'd really prefer copying it to a tmp buffer and
then verifying it's corrent then memcpy()ing it to &instance->tx_cfg.

regards,
dan carpenter