linux-imx

/*

 * Changes:

 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 08/23/2000

 * - get rid of some verify_areas and use __copy*user and __get/put_user

 *   for the ones that remain

 */

#include <linux/module.h>

#include <linux/blkdev.h>

#include <linux/interrupt.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/sched.h>

#include <linux/mm.h>

#include <linux/string.h>

#include <linux/uaccess.h>

​

#include <scsi/scsi.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_eh.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_ioctl.h>

#include <scsi/sg.h>

#include <scsi/scsi_dbg.h>

​

#include "scsi_logging.h"

​

#define NORMAL_RETRIES          5

#define IOCTL_NORMAL_TIMEOUT            (10 * HZ)

​

#define MAX_BUF PAGE_SIZE

​

/**

 * ioctl_probe  --  return host identification

 * @host:   host to identify

 * @buffer: userspace buffer for identification

 *

 * Return an identifying string at @buffer, if @buffer is non-NULL, filling

 * to the length stored at * (int *) @buffer.

 */

static int ioctl_probe(struct Scsi_Host *host, void __user *buffer)

{

    unsigned int len, slen;

    const char *string;

​

    if (buffer) {

        if (get_user(len, (unsigned int __user *) buffer))

            return -EFAULT;

​

        if (host->hostt->info)

            string = host->hostt->info(host);

        else

            string = host->hostt->name;

        if (string) {

            slen = strlen(string);

            if (len > slen)

                len = slen + 1;

            if (copy_to_user(buffer, string, len))

                return -EFAULT;

        }

    }

    return 1;

}