[PATCH 1/2] clk: fix clk_get error handling

[Sam Ravnborg]

>From feaf9f379a1100b3e56faa83e22360b25a5eb904 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <srn at skov.dk>
Date: Mon, 3 Jul 2017 21:21:02 +0200
Subject: [PATCH 1/2] clk: fix clk_get error handling
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If there is no OFTREE support of_clk_get_by_name failed with
-ENOENT, which caused clk_get to bail out.
This had the effect that nothing was printed on the serial console
with at91sam9263-ek.

Fix this by modifying the logic to explicitly check for -EPROBE_DEFER
like we do in the kernel.

Fixes: 90f7eacb ("clk: let clk_get return errors from of_clk_get_by_name")
Cc: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
---
 drivers/clk/clkdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 6b1666355..939b067cc 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -181,7 +181,7 @@ struct clk *clk_get(struct device_d *dev, const char *con_id)
 
 	if (dev) {
 		clk = of_clk_get_by_name(dev->device_node, con_id);
-		if (!IS_ERR(clk) || PTR_ERR(clk) != -ENODEV)
+		if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 			return clk;
 	}
 
-- 
2.12.0