On Mon, Jul 21, 2014 at 02:47:45PM -0400, Erik Arfvidson wrote:
> This patch adds enable_ints entry to virthba directory
>
> Signed-off-by: Erik Arfvidson <erik.arfvid...@unisys.com>
> Signed-off-by: Benjamin Romer <benjamin.ro...@unisys.com>
> ---
> drivers/staging/unisys/virthba/virthba.c | 63
> ++++++++++++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> diff --git a/drivers/staging/unisys/virthba/virthba.c
> b/drivers/staging/unisys/virthba/virthba.c
> index 857de11..65a75c8 100644
> --- a/drivers/staging/unisys/virthba/virthba.c
> +++ b/drivers/staging/unisys/virthba/virthba.c
> @@ -112,6 +112,8 @@ static void doDiskAddRemove(struct work_struct *work);
> static void virthba_serverdown_complete(struct work_struct *work);
> static ssize_t info_debugfs_read(struct file *file, char __user *buf,
> size_t len, loff_t *offset);
> +static ssize_t enable_ints_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *ppos);
>
> /*****************************************************/
> /* Globals */
> @@ -233,6 +235,10 @@ static const struct file_operations debugfs_info_fops = {
> .read = info_debugfs_read,
> };
>
> +static const struct file_operations debugfs_enable_ints_fops = {
> + .write = enable_ints_write,
> +};
> +
> /*****************************************************/
> /* Structs */
> /*****************************************************/
> @@ -1415,6 +1421,60 @@ static ssize_t info_debugfs_read(struct file *file,
> return bytes_read;
> }
>
> +static ssize_t enable_ints_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *ppos)
> +{
> + char buf[4];
> + int i, new_value;
> + struct virthba_info *virthbainfo;
> +
> + U64 __iomem *Features_addr;
> + U64 mask;
> +
> + if (count >= ARRAY_SIZE(buf))
> + return -EINVAL;
> +
> + buf[count] = '\0';
> + if (copy_from_user(buf, buffer, count)) {
> + LOGERR("copy_from_user failed. buf<<%.*s>> count<<%lu>>\n",
> + (int) count, buf, count);
> + return -EFAULT;
> + }
> +
> + i = kstrtoint(buf, 10 , &new_value);
> +
> + if (i != 0) {
> + LOGERR("Failed to scan value for enable_ints, buf<<%.*s>>",
> + (int) count, buf);
> + return -EFAULT;
Careful with allowing userspace to flood the log :(
> + }
> +
> + /*set all counts to new_value usually 0*/
We don't have a lack of ' ' characters available to us, please use
them...
thanks,
greg k-h
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