Re: [[linux-nfc] PATCH v5 2/3] driver: nfc: Add ST95HF NFC Transceiver support

[Samuel Ortiz <sameo@linux.intel.com>]

Hi Singh,

This looks a lot better than the initial version.
I only have one question:

On Fri, Nov 20, 2015 at 06:40:20AM -0500, Shikha Singh wrote:
> +/*
> + * st95hf_send_recv_cmd() is for sending commands to ST95HF
> + * that are described in the cmd_array[]. It can optionally
> + * receive the response if the cmd request is of type
> + * SYNC. For that to happen caller must pass true to recv_res.
> + * For ASYNC request, recv_res is ignored and the
> + * function will never try to receive the response on behalf
> + * of the caller.
> + */
> +static int st95hf_send_recv_cmd(struct st95hf_context *st95context,
> +				enum st95hf_cmd_list cmd,
> +				int no_modif,
> +				struct param_list *list_array,
> +				bool recv_res)
> +{
> +	unsigned char spi_cmd_buffer[MAX_CMD_LEN];
> +	int i, ret;
> +	struct device *dev = &st95context->spicontext.spidev->dev;
How do you know this driver is still valid at that point ?
It seems to be a potential corner case against the driver's remove
function, but it seems to be a race nevertheless.

Cheers,
Samuel.