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rtc: pfc8563: fix uninitialized variable warning

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Gcc is unable to prove that alm_pending is always initialized
when it is used, so it prints a harmless warning:

drivers/rtc/rtc-pcf8563.c: In function 'pcf8563_probe':
drivers/rtc/rtc-pcf8563.c:449:5: warning: 'alm_pending' may be used uninitialized in this function [-Wmaybe-uninitialized]

This uses the same conditional expression that is used inside of
the pcf8563_get_alarm_mode() function, to help gcc figure it out
and shut up that warning, and make the ARM defconfigs build again
with no warnings.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: a45d528aab8b ("rtc: pcf8563: clear expired alarm at boot time")
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Arnd Bergmann 2015-05-12 23:27:02 +02:00 committed by Alexandre Belloni
parent e3edd67141
commit cd1420d3a9
1 changed files with 1 additions and 1 deletions
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2
drivers/rtc/rtc-pcf8563.c
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@ -432,7 +432,7 @@ static int pcf8563_probe(struct i2c_client *client,
} }
err = pcf8563_get_alarm_mode(client, NULL, &alm_pending); err = pcf8563_get_alarm_mode(client, NULL, &alm_pending);
if (err < 0) { if (err) {
dev_err(&client->dev, "%s: read error\n", __func__); dev_err(&client->dev, "%s: read error\n", __func__);
return err; return err;
} }