linux-kernel - [ 30/57] hwmon: (w83627ehf) Force initial bank selection

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Message-Id: <20121115040935.069544523@linuxfoundation.org>
Date:	Wed, 14 Nov 2012 20:11:38 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [ 30/57] hwmon: (w83627ehf) Force initial bank selection

3.4-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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwmon/w83627ehf.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -2082,6 +2082,7 @@ static int __devinit w83627ehf_probe(str
 	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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