linux-kernel - [ 57/82] hwmon: (w83627ehf) Force initial bank selection

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Message-Id: <20121114053941.728271535@decadent.org.uk>
Date:	Wed, 14 Nov 2012 05:40:30 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [ 57/82] hwmon: (w83627ehf) Force initial bank selection

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean Delvare <khali@...ux-fr.org>

commit 3300fb4f88688029fff8dfb9ec0734f6e4cba3e7 upstream.

Don't assume bank 0 is selected at device probe time. This may not be
the case. Force bank selection at first register access to guarantee
that we read the right registers upon driver loading.

Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/hwmon/w83627ehf.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 1821b74..de3c7e0 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -2083,6 +2083,7 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 	mutex_init(&data->lock);
 	mutex_init(&data->update_lock);
 	data->name = w83627ehf_device_names[sio_data->kind];
+	data->bank = 0xff;		/* Force initial bank selection */
 	platform_set_drvdata(pdev, data);
 
 	/* 627EHG and 627EHF have 10 voltage inputs; 627DHG and 667HG have 9 */


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