Andrey Panin <[email protected]> wrote:
>
>
> This patch adds driver for IBM Automatic Server Restart watchdog hardware
> found in some IBM eServer xSeries machines. This driver is based on the ugly
> driver provided by IBM. Driver was tested on IBM eServer 226.
>
> ...
> +
> + case ASMTYPE_JASPER:
> + type = "Jaspers ";
> +
> + /* FIXME: need to use pci_config_lock here, but it's not exported */
That's gregkh material.
> +
> +/* spin_lock_irqsave(&pci_config_lock, flags);*/
> +
> + /* Select the SuperIO chip in the PCI I/O port register */
> + outl(0x8000f858, 0xcf8);
> +
> + /*
> + * Read the base address for the SuperIO chip.
> + * Only the lower 16 bits are valid, but the address is word
> + * aligned so the last bit must be masked off.
> + */
> + asr_base = inl(0xcfc) & 0xfffe;
> +
> +/* spin_unlock_irqrestore(&pci_config_lock, flags);*/
>
> ...
>
> +static int asr_ioctl(struct inode *inode, struct file *file,
> + unsigned int cmd, unsigned long arg)
> +{
> + static const struct watchdog_info ident = {
> + .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
> + WDIOF_MAGICCLOSE,
> + .identity = "IBM ASR"
> + };
> + void __user *argp = (void __user *)arg;
> + int __user *p = argp;
> + int heartbeat;
> +
> + switch (cmd) {
> + case WDIOC_GETSUPPORT:
> + return copy_to_user(argp, &ident, sizeof(ident)) ?
> + -EFAULT : 0;
> +
> + case WDIOC_GETSTATUS:
> + case WDIOC_GETBOOTSTATUS:
> + return put_user(0, p);
> +
> + case WDIOC_KEEPALIVE:
> + asr_toggle();
> + return 0;
> +
> +
> + case WDIOC_SETTIMEOUT:
> + if (get_user(heartbeat, p))
> + return -EFAULT;
> + /* Fall */
> +
> + case WDIOC_GETTIMEOUT:
> + heartbeat = 256;
> + return put_user(heartbeat, p);
Something very wrong is happening with WDIOC_SETTIMEOUT and
WDIOC_GETTIMEOUT. They're both no-ops and the effect of WDIOC_SETTIMEOUT
is immidiately overwritten.
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