From: loos <loos@FreeBSD.org>
Date: Tue, 13 Dec 2016 03:36:41 +0000 (+0000)
Subject: Remove a too strict test and instead, just filter the passed flags with the
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=9d168758d59bedb0efa0a7c4acea1c46b10daffc;p=people%2Froyger%2Ffreebsd.git

Remove a too strict test and instead, just filter the passed flags with the
supported capabilities.

Spotted by:	yamori813@yahoo.co.jp (Hiroki Mori)
MFC after:	2 weeks
---

diff --git a/sys/dev/gpio/gpiobus.c b/sys/dev/gpio/gpiobus.c
index 056dd3193d4f..90e447d065dd 100644
--- a/sys/dev/gpio/gpiobus.c
+++ b/sys/dev/gpio/gpiobus.c
@@ -120,9 +120,9 @@ int
 gpio_check_flags(uint32_t caps, uint32_t flags)
 {
 
-	/* Check for unwanted flags. */
-	if ((flags & caps) == 0 || (flags & caps) != flags)
-		return (EINVAL);
+	/* Filter unwanted flags. */
+	flags &= caps;
+
 	/* Cannot mix input/output together. */
 	if (flags & GPIO_PIN_INPUT && flags & GPIO_PIN_OUTPUT)
 		return (EINVAL);