From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
Chris Wedgwood <reviews@ml.cw.f00f.org>,
Michael Krufky <mkrufky@linuxtv.org>,
Chuck Ebbert <cebbert@redhat.com>,
Domenico Andreoli <cavokz@gmail.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk,
"Mark M. Hoffman" <mhoffman@lightlink.com>,
Jean Delvare <khali@linux-fr.org>
Subject: [patch 24/26] hwmon/w83627hf: Dont assume bank 0
Date: Wed, 31 Oct 2007 08:12:23 -0700 [thread overview]
Message-ID: <20071031151223.GY2437@kroah.com> (raw)
In-Reply-To: <20071031151015.GA2437@kroah.com>
[-- Attachment #1: hwmon-w83627hf-don-t-assume-bank-0.patch --]
[-- Type: text/plain, Size: 3729 bytes --]
2.6.22-stable review patch. If anyone has any objections, please let us
know.
------------------
From: Jean Delvare <khali@linux-fr.org>
Already in Linus' tree:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d58df9cd788e6fb4962e1c8d5ba7b8b95d639a44
The bank switching code assumes that the bank selector is set to 0
when the driver is loaded. This might not be the case. This is exactly
the same bug as was fixed in the w83627ehf driver two months ago:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0956895aa6f8dc6a33210967252fd7787652537d
In practice, this bug was causing the sensor thermal types to be
improperly reported for my W83627THF the first time I was loading the
w83627hf driver. From the driver history, I'd say that it has been
broken since September 2005 (when we stopped resetting the chip by
default at driver load.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/hwmon/w83627hf.c | 44 ++++++++++++++++++++++----------------------
1 file changed, 22 insertions(+), 22 deletions(-)
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -1209,6 +1209,24 @@ static int __devexit w83627hf_remove(str
}
+/* Registers 0x50-0x5f are banked */
+static inline void w83627hf_set_bank(struct w83627hf_data *data, u16 reg)
+{
+ if ((reg & 0x00f0) == 0x50) {
+ outb_p(W83781D_REG_BANK, data->addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(reg >> 8, data->addr + W83781D_DATA_REG_OFFSET);
+ }
+}
+
+/* Not strictly necessary, but play it safe for now */
+static inline void w83627hf_reset_bank(struct w83627hf_data *data, u16 reg)
+{
+ if (reg & 0xff00) {
+ outb_p(W83781D_REG_BANK, data->addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(0, data->addr + W83781D_DATA_REG_OFFSET);
+ }
+}
+
static int w83627hf_read_value(struct w83627hf_data *data, u16 reg)
{
int res, word_sized;
@@ -1219,12 +1237,7 @@ static int w83627hf_read_value(struct w8
&& (((reg & 0x00ff) == 0x50)
|| ((reg & 0x00ff) == 0x53)
|| ((reg & 0x00ff) == 0x55));
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- data->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(reg >> 8,
- data->addr + W83781D_DATA_REG_OFFSET);
- }
+ w83627hf_set_bank(data, reg);
outb_p(reg & 0xff, data->addr + W83781D_ADDR_REG_OFFSET);
res = inb_p(data->addr + W83781D_DATA_REG_OFFSET);
if (word_sized) {
@@ -1234,11 +1247,7 @@ static int w83627hf_read_value(struct w8
(res << 8) + inb_p(data->addr +
W83781D_DATA_REG_OFFSET);
}
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- data->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(0, data->addr + W83781D_DATA_REG_OFFSET);
- }
+ w83627hf_reset_bank(data, reg);
mutex_unlock(&data->lock);
return res;
}
@@ -1309,12 +1318,7 @@ static int w83627hf_write_value(struct w
|| ((reg & 0xff00) == 0x200))
&& (((reg & 0x00ff) == 0x53)
|| ((reg & 0x00ff) == 0x55));
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- data->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(reg >> 8,
- data->addr + W83781D_DATA_REG_OFFSET);
- }
+ w83627hf_set_bank(data, reg);
outb_p(reg & 0xff, data->addr + W83781D_ADDR_REG_OFFSET);
if (word_sized) {
outb_p(value >> 8,
@@ -1324,11 +1328,7 @@ static int w83627hf_write_value(struct w
}
outb_p(value & 0xff,
data->addr + W83781D_DATA_REG_OFFSET);
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- data->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(0, data->addr + W83781D_DATA_REG_OFFSET);
- }
+ w83627hf_reset_bank(data, reg);
mutex_unlock(&data->lock);
return 0;
}
--
next prev parent reply other threads:[~2007-10-31 15:31 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071031150535.967437651@mini.kroah.org>
2007-10-31 15:10 ` [patch 00/26] 2.6.22-stable review Greg KH
2007-10-31 15:10 ` [patch 01/26] ACPI: disable lower idle C-states across suspend/resume Greg KH
2007-10-31 15:10 ` [patch 02/26] Fix ESP host instance numbering Greg KH
2007-10-31 15:11 ` [patch 03/26] Fix cls_u32 error return handling Greg KH
2007-10-31 15:11 ` [patch 04/26] Fix ieee80211 handling of bogus hdrlength field Greg KH
2007-10-31 15:11 ` [patch 05/26] Fix some cases of missed IPV6 DAD Greg KH
2007-10-31 15:11 ` [patch 06/26] Fix ipv6 redirect processing, leads to TAHI failures Greg KH
2007-10-31 15:11 ` [patch 07/26] Fix ROSE module unload oops Greg KH
2007-10-31 15:11 ` [patch 08/26] Fix zero length socket write() semantics Greg KH
2007-10-31 15:11 ` [patch 09/26] Fix sys_ipc() SEMCTL on sparc64 Greg KH
2007-10-31 15:11 ` [patch 10/26] Fix TCPs ->fastpath_cnt_hit handling Greg KH
2007-10-31 15:11 ` [patch 11/26] : Fix TCP MD5 on big-endian Greg KH
2007-10-31 15:11 ` [patch 12/26] : Fix TCP initial sequence number selection Greg KH
2007-10-31 15:11 ` [patch 13/26] mac80211: filter locally-originated multicast frames Greg KH
2007-10-31 15:11 ` [patch 14/26] libertas: fix endianness breakage Greg KH
2007-10-31 15:11 ` [patch 15/26] libertas: more " Greg KH
2007-10-31 15:11 ` [patch 16/26] Add get_unaligned to ieee80211_get_radiotap_len Greg KH
2007-10-31 15:11 ` [patch 17/26] firewire: fix unloading of fw-ohci while devices are attached Greg KH
2007-10-31 15:12 ` [patch 18/26] netdrvr: natsemi: Fix device removal bug Greg KH
2007-10-31 15:12 ` [patch 19/26] dm9601: Fix receive MTU Greg KH
2007-10-31 15:12 ` [patch 20/26] V4L: ivtv: fix udma yuv bug Greg KH
2007-10-31 15:12 ` [patch 21/26] hwmon/lm87: Fix a division by zero Greg KH
2007-10-31 15:12 ` [patch 22/26] hwmon/lm87: Disable VID when it should be Greg KH
2007-10-31 15:12 ` [patch 23/26] hwmon/w83627hf: Fix setting fan min right after driver load Greg KH
2007-10-31 15:12 ` Greg KH [this message]
2007-10-31 15:12 ` [patch 25/26] i915: fix vbl swap allocation size Greg KH
2007-10-31 15:12 ` [patch 26/26] POWERPC: Fix handling of stfiwx math emulation Greg KH
2007-10-31 15:21 ` [patch 00/26] 2.6.22-stable review Greg KH
2007-10-31 16:25 ` [patch 27/26] lockdep: fix mismatched lockdep_depth/curr_chain_hash Greg KH
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20071031151223.GY2437@kroah.com \
--to=gregkh@suse.de \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=cavokz@gmail.com \
--cc=cebbert@redhat.com \
--cc=chuckw@quantumlinux.com \
--cc=davej@redhat.com \
--cc=jmforbes@linuxtx.org \
--cc=khali@linux-fr.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mhoffman@lightlink.com \
--cc=mkrufky@linuxtv.org \
--cc=rdunlap@xenotime.net \
--cc=reviews@ml.cw.f00f.org \
--cc=stable@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=tytso@mit.edu \
--cc=zwane@arm.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox