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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Sasha Levin <sashal@kernel.org>, linux-rtc@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 071/141] rtc: hym8563: Return -EINVAL if the time is known to be invalid
Date:   Fri, 14 Feb 2020 11:20:11 -0500
Message-Id: <20200214162122.19794-71-sashal@kernel.org>
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From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

[ Upstream commit f236a2a2ebabad0848ad0995af7ad1dc7029e895 ]

The current code returns -EPERM when the voltage loss bit is set.
Since the bit indicates that the time value is not valid, return
-EINVAL instead, which is the appropriate error code for this
situation.

Fixes: dcaf03849352 ("rtc: add hym8563 rtc-driver")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://lore.kernel.org/r/20191212153111.966923-1-paul.kocialkowski@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/rtc/rtc-hym8563.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index e5ad527cb75e3..a8c2d38b24112 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -105,7 +105,7 @@ static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 	if (!hym8563->valid) {
 		dev_warn(&client->dev, "no valid clock/calendar values available\n");
-		return -EPERM;
+		return -EINVAL;
 	}
 
 	ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf);
-- 
2.20.1