linux-kernel - [PATCH v2] rtc: hym8563: enable wakeup when applicable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1ea023e2ba50a4dab6e39be93d7de3146af71a60.1604653374.git.guillaume.tucker@collabora.com>
Date:   Fri,  6 Nov 2020 09:06:31 +0000
From:   Guillaume Tucker <guillaume.tucker@...labora.com>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com,
        Guillaume Tucker <guillaume.tucker@...labora.com>
Subject: [PATCH v2] rtc: hym8563: enable wakeup when applicable

Enable wakeup in the hym8563 driver if the IRQ was successfully
requested or if wakeup-source is set in the devicetree.

As per the description of device_init_wakeup(), it should be enabled
for "devices that everyone expects to be wakeup sources".  One would
expect this to be the case with a real-time clock.

Tested on rk3288-rock2-square, which has an IRQ configured for the
RTC.  As a result, wakeup was enabled during driver initialisation.

Fixes: dcaf03849352 ("rtc: add hym8563 rtc-driver")
Reported-by: kernelci.org bot <bot@...nelci.org>
Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
---

Notes:
    v2: enable wakeup if irq or wakeup-source

 drivers/rtc/rtc-hym8563.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index 0fb79c4afb46..24e0095be058 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -527,8 +527,6 @@ static int hym8563_probe(struct i2c_client *client,
 	hym8563->client = client;
 	i2c_set_clientdata(client, hym8563);
 
-	device_set_wakeup_capable(&client->dev, true);
-
 	ret = hym8563_init_device(client);
 	if (ret) {
 		dev_err(&client->dev, "could not init device, %d\n", ret);
@@ -547,6 +545,11 @@ static int hym8563_probe(struct i2c_client *client,
 		}
 	}
 
+	if (client->irq > 0 ||
+	    device_property_read_bool(&client->dev, "wakeup-source")) {
+		device_init_wakeup(&client->dev, true);
+	}
+
 	/* check state of calendar information */
 	ret = i2c_smbus_read_byte_data(client, HYM8563_SEC);
 	if (ret < 0)
-- 
2.20.1