Comment # 63 on bug 944978 from Takashi Iwai

Thanks.  Unfortunately no debug print hits at the spot.

Now looking at the code closely, I see a few bad things:
- _rtl_pci_interrupt() always returns IRQ_HANDLED even for a shared irq.
- msi_support flag is set multiple times in rtl8821ae/sw.c, a few of them are
either superfluous or wrong.

int rtl8821ae_init_sw_vars(struct ieee80211_hw *hw)
{
....
    rtlpci->msi_support = rtlpriv->cfg->mod_params->msi_support;
....
    rtlpci->msi_support = rtlpriv->cfg->mod_params->msi_support;
    rtlpci->msi_support = rtlpriv->cfg->mod_params->int_clear;
    if (rtlpriv->cfg->mod_params->disable_watchdog)
        pr_info("watchdog disabled\n");
    rtlpriv->psc.reg_fwctrl_lps = 3;
    rtlpriv->psc.reg_max_lps_awakeintvl = 5;
    rtlpci->msi_support = rtlpriv->cfg->mod_params->msi_support;
.....

Larry, what's the purpose of tweaking his for int_clear?