linux-kernel - [PATCH 19/45] rtc: rv8803: fix possible race condition

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Date:   Mon, 12 Feb 2018 23:47:33 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     linux-rtc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 19/45] rtc: rv8803: fix possible race condition

The probe function is not allowed to fail after registering the RTC. Call
rtc_register_device() at the end.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-rv8803.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 6fb5041f750b..29fc3d210392 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -590,14 +590,6 @@ static int rv8803_probe(struct i2c_client *client,
 		}
 	}
 
-	rv8803->rtc->ops = &rv8803_rtc_ops;
-	rv8803->rtc->nvram_old_abi = true;
-	err = rtc_register_device(rv8803->rtc);
-	if (err)
-		return err;
-
-	rtc_nvmem_register(rv8803->rtc, &nvmem_cfg);
-
 	err = rv8803_write_reg(rv8803->client, RV8803_EXT, RV8803_EXT_WADA);
 	if (err)
 		return err;
@@ -608,6 +600,14 @@ static int rv8803_probe(struct i2c_client *client,
 		return err;
 	}
 
+	rv8803->rtc->ops = &rv8803_rtc_ops;
+	rv8803->rtc->nvram_old_abi = true;
+	err = rtc_register_device(rv8803->rtc);
+	if (err)
+		return err;
+
+	rtc_nvmem_register(rv8803->rtc, &nvmem_cfg);
+
 	rv8803->rtc->max_user_freq = 1;
 
 	return 0;
-- 
2.16.1