linux-kernel - [PATCH 3.16 33/99] rtc: hym8563: Return -EINVAL if the time is known to be invalid

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Message-ID: <lsq.1589984008.474601281@decadent.org.uk>
Date:   Wed, 20 May 2020 15:14:01 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Paul Kocialkowski" <paul.kocialkowski@...tlin.com>,
        "Alexandre Belloni" <alexandre.belloni@...tlin.com>
Subject: [PATCH 3.16 33/99] rtc: hym8563: Return -EINVAL if the time is
 known to be invalid

3.16.84-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

commit f236a2a2ebabad0848ad0995af7ad1dc7029e895 upstream.

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@...tlin.com>
Link: https://lore.kernel.org/r/20191212153111.966923-1-paul.kocialkowski@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/rtc/rtc-hym8563.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -105,7 +105,7 @@ static int hym8563_rtc_read_time(struct
 
 	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);