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From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Jean Delvare <jdelvare@suse.de>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Len Brown <lenb@kernel.org>,
	linux-acpi@vger.kernel.org,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	linux-watchdog@vger.kernel.org,
	Robert Moore <robert.moore@intel.com>,
	Erik Kaneda <erik.kaneda@intel.com>,
	Tom Abraham <tabraham@suse.com>
Subject: Re: [PATCH v2 2/3] ACPI / watchdog: Fix gas->access_width usage
Date: Wed, 12 Feb 2020 18:58:00 +0200
Message-ID: <20200212165800.GG2667@lahna.fi.intel.com> (raw)
In-Reply-To: <20200212165537.46f251cf@endymion>

On Wed, Feb 12, 2020 at 04:55:37PM +0100, Jean Delvare wrote:
> On Wed, 12 Feb 2020 17:59:40 +0300, Mika Westerberg wrote:
> > ACPI Generic Address Structure (GAS) access_width field is not in bytes
> > as the driver seems to expect in few places so fix this by using the
> > newly introduced macro ACPI_ACCESS_BYTE_WIDTH().
> > 
> > Fixes: b1abf6fc4982 ("ACPI / watchdog: Fix off-by-one error at resource assignment")
> 
> It does not actually fix that commit, as the bug already existed prior
> to it. It has to be applied on top of that commit though because they
> touch the same lines, granted.

Yeah, I figured I should put the dependency commit here as well. I guess
Depends-on can be used as well:

Depends-on: b1abf6fc4982 ("ACPI / watchdog: Fix off-by-one error at resource assignment")

> > Fixes: 058dfc767008 ("ACPI / watchdog: Add support for WDAT hardware watchdog")
> > Reported-by: Jean Delvare <jdelvare@suse.de>
> > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> > ---
> >  drivers/acpi/acpi_watchdog.c | 3 +--
> >  drivers/watchdog/wdat_wdt.c  | 2 +-
> >  2 files changed, 2 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/acpi/acpi_watchdog.c b/drivers/acpi/acpi_watchdog.c
> > index b5516b04ffc0..d827a4a3e946 100644
> > --- a/drivers/acpi/acpi_watchdog.c
> > +++ b/drivers/acpi/acpi_watchdog.c
> > @@ -126,12 +126,11 @@ void __init acpi_watchdog_init(void)
> >  		gas = &entries[i].register_region;
> >  
> >  		res.start = gas->address;
> > +		res.end = res.start + ACPI_ACCESS_BYTE_WIDTH(gas->access_width) - 1;
> >  		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
> >  			res.flags = IORESOURCE_MEM;
> > -			res.end = res.start + ALIGN(gas->access_width, 4) - 1;
> >  		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
> >  			res.flags = IORESOURCE_IO;
> > -			res.end = res.start + gas->access_width - 1;
> >  		} else {
> >  			pr_warn("Unsupported address space: %u\n",
> >  				gas->space_id);
> > diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
> > index b069349b52f5..e1b1fcfc02af 100644
> > --- a/drivers/watchdog/wdat_wdt.c
> > +++ b/drivers/watchdog/wdat_wdt.c
> > @@ -389,7 +389,7 @@ static int wdat_wdt_probe(struct platform_device *pdev)
> >  
> >  		memset(&r, 0, sizeof(r));
> >  		r.start = gas->address;
> > -		r.end = r.start + gas->access_width - 1;
> > +		r.end = r.start + ACPI_ACCESS_BYTE_WIDTH(gas->access_width) - 1;
> >  		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
> >  			r.flags = IORESOURCE_MEM;
> >  		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
> 
> Reviewed-by: Jean Delvare <jdelvare@suse.de>

Thanks!

  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12 14:59 [PATCH v2 0/3] ACPI / watchdog: Fix two reported issues Mika Westerberg
2020-02-12 14:59 ` [PATCH v2 1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro Mika Westerberg
2020-02-12 21:02   ` Moore, Robert
2020-02-12 14:59 ` [PATCH v2 2/3] ACPI / watchdog: Fix gas->access_width usage Mika Westerberg
2020-02-12 15:55   ` Jean Delvare
2020-02-12 16:58     ` Mika Westerberg [this message]
2020-02-12 14:59 ` [PATCH v2 3/3] ACPI / watchdog: Set default timeout in probe Mika Westerberg
2020-02-12 16:04   ` Jean Delvare
2020-02-13 22:53 ` [PATCH v2 0/3] ACPI / watchdog: Fix two reported issues Rafael J. Wysocki

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