Subject: Re: [PATCH] ath9k: add a quirk to set use_msi automatically

From: Kalle Valo <[email-masked]>
Date: Tue, 09 Jan 2018 09:29:14 +0200

AceLan Kao <[email-masked]> writes:

> Some platform(BIOS) blocks legacy interrupts (INTx), and only allows MSI
> for WLAN device. So adding a quirk to list those machines and set
> use_msi automatically.
> Adding the following platforms to the quirk.
>    Dell Inspiron 24-3460
>    Dell Inspiron 3472
>    Dell Inspiron 14-3473
>    Dell Vostro 3262
>    Dell Vostro 15-3572
>
> Signed-off-by: AceLan Kao <[email-masked]>

[...]

> @@ -96,6 +97,56 @@ static const struct ieee80211_tpt_blink ath9k_tpt_blink[] = {
>  };
>  #endif
>  
> +static int __init set_use_msi(const struct dmi_system_id *dmi)
> +{
> +	ath9k_use_msi = 1;
> +	return 1;
> +}
> +
> +static const struct dmi_system_id ath9k_quirks[] __initconst = {
> +	{
> +		.callback = set_use_msi,
> +		.ident = "Dell Inspiron 24-3460",
> +		.matches = {
> +			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> +			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 24-3460"),
> +		},
> +	},

Larry, didn't rtlwifi have similar situation that with certain laptops
users were required to enable a module parameter to get the device
working? I think rtlwifi should do the same as AceLan does here as then
the user would not need to manually set the module parameter.

-- 
Kalle Valo