lkml.org 
[lkml]   [2011]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 2/2] Use "request_muxed_region" in it87 hwmon drivers
Date
02 - Chages to hwmon it87 driver to use "request_muxed_region"
Serialize access to the hardware by using "request_muxed_region" macro defined
by Alan Cox. Call to this macro will hold off the requestor if the resource is
currently busy.

Signed-off-by: Nat Gurumoorthy <natg@google.com>
---

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 316b648..1dc04d4 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -111,6 +111,9 @@ superio_select(int ldn)
static inline void
superio_enter(void)
{
+ while (!request_muxed_region(REG, 2, DRVNAME))
+ continue;
+
outb(0x87, REG);
outb(0x01, REG);
outb(0x55, REG);
@@ -122,6 +125,7 @@ superio_exit(void)
{
outb(0x02, REG);
outb(0x02, VAL);
+ release_region(REG, 2);
}

/* Logical device 4 registers */
--
1.7.3.1


\
 
 \ /
  Last update: 2011-04-12 01:57    [W:0.045 / U:0.812 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site