linux-kernel - Re: [PATCH v3 02/11] power: charger-manager: don't write through desc->properties

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Message-ID: <20200501133008.GA8927@qmqm.qmqm.pl>
Date:   Fri, 1 May 2020 15:30:08 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 02/11] power: charger-manager: don't write through
 desc->properties

On Fri, May 01, 2020 at 02:38:49PM +0200, Sebastian Reichel wrote:
> Hi,
> 
> On Fri, Apr 03, 2020 at 10:20:31PM +0200, Michał Mirosław wrote:
> > psy_desc->properties will become pointer to const.  Avoid writing
> > through the pointer to enable constification of the tables elsewhere.
> > 
> > Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> For patches 1-3 I used my version, that I wrote in parallel while
> reviewing a different patch series. It is slightly different, but
> achieves the same goal.

There is a bug in the tree now regarding use of num_properties
in charger-manager.  Following patch should fix it.

Best Regards,
Michał Mirosław

diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
index a71e2ee81423..2ef53dc1f2fb 100644
--- a/drivers/power/supply/charger-manager.c
+++ b/drivers/power/supply/charger-manager.c
@@ -1740,14 +1740,14 @@ static int charger_manager_probe(struct platform_device *pdev)
 	}
 	if (!power_supply_get_property(fuel_gauge,
 					  POWER_SUPPLY_PROP_CHARGE_NOW, &val)) {
-		properties[cm->charger_psy_desc.num_properties] =
+		properties[num_properties] =
 				POWER_SUPPLY_PROP_CHARGE_NOW;
 		num_properties++;
 	}
 	if (!power_supply_get_property(fuel_gauge,
 					  POWER_SUPPLY_PROP_CURRENT_NOW,
 					  &val)) {
-		properties[cm->charger_psy_desc.num_properties] =
+		properties[num_properties] =
 				POWER_SUPPLY_PROP_CURRENT_NOW;
 		num_properties++;
 	}