From 56a6cb88657557edd84eabddd9f509d13b5b81c5 Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Wed, 31 May 2017 12:27:44 +0530
Subject: [PATCH] i2c: at91: Handle return value of clk_prepare_enable
clk_prepare_enable() can fail here and we must check its return value.
Also, add a missing clk_disable_unprepare().
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---
drivers/i2c/busses/i2c-at91.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index fabbb9e4916129..2525cd9bcbbdd5 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -1083,12 +1083,16 @@ static int at91_twi_probe(struct platform_device *pdev)
dev_err(dev->dev, "no clock defined\n");
return -ENODEV;
}
- clk_prepare_enable(dev->clk);
+ rc = clk_prepare_enable(dev->clk);
+ if (rc)
+ return rc;
if (dev->dev->of_node) {
rc = at91_twi_configure_dma(dev, phy_addr);
- if (rc == -EPROBE_DEFER)
+ if (rc == -EPROBE_DEFER) {
+ clk_disable_unprepare(dev->clk);
return rc;
+ }
}
if (!of_property_read_u32(pdev->dev.of_node, "atmel,fifo-size",
--
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