From: Guenter Roeck <linux@roeck-us.net>
Date: Wed, 20 Sep 2017 22:19:33 +0000 (-0700)
Subject: Add 'ignore_resource_conflict' error
X-Git-Tag: v1.0~7
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=67f8b470ec25ba24d6334061f4494330c847ac46;p=groeck-it87

Add 'ignore_resource_conflict' error

It appears that some BIOSes reserve ACPI resources without using them,
and acpi_enable_resources=lax seems to result in failures to load
certain drivers.

Introduce a 'ignore_resource_conflict' module parameter as alternate
means to ignore ACPI resource conflicts.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/it87.c b/it87.c
index eae64f3..027ede9 100644
--- a/it87.c
+++ b/it87.c
@@ -86,6 +86,10 @@ static unsigned short force_id;
 module_param(force_id, ushort, 0);
 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 
+static bool ignore_resource_conflict;
+module_param(ignore_resource_conflict, bool, 0);
+MODULE_PARM_DESC(ignore_resource_conflict, "Ignore ACPI resource conflict");
+
 static struct platform_device *it87_pdev[2];
 
 #define	REG_2E	0x2e	/* The register to read/write */
@@ -3801,8 +3805,10 @@ static int __init it87_device_add(int index, unsigned short address,
 	int err;
 
 	err = acpi_check_resource_conflict(&res);
-	if (err)
-		return err;
+	if (err) {
+		if (!ignore_resource_conflict)
+			return err;
+	}
 
 	pdev = platform_device_alloc(DRVNAME, address);
 	if (!pdev)