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From 7fd7a26b60090a7df15f30ba10b0d39cbbd6a94e Mon Sep 17 00:00:00 2001
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From: Alban Bedel <albeu@free.fr>
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Date: Tue, 1 Sep 2015 17:28:31 +0200
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Subject: [PATCH] reset: Fix of_reset_control_get() for consistent return
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values
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When of_reset_control_get() is called without connection ID it returns
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-ENOENT when the 'resets' property doesn't exists or is an empty entry.
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However when a connection ID is given it returns -EINVAL when the 'resets'
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property doesn't exists or the requested name can't be found. This is
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because the error code returned by of_property_match_string() is just
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passed down as an index to of_parse_phandle_with_args(), which then
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returns -EINVAL.
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To get a consistent return value with both code paths we must return
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-ENOENT when of_property_match_string() fails.
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Signed-off-by: Alban Bedel <albeu@free.fr>
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Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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---
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drivers/reset/core.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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--- a/drivers/reset/core.c
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+++ b/drivers/reset/core.c
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@@ -215,9 +215,12 @@ struct reset_control *of_reset_control_g
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{
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int index = 0;
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- if (id)
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+ if (id) {
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index = of_property_match_string(node,
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"reset-names", id);
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+ if (index < 0)
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+ return ERR_PTR(-ENOENT);
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+ }
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return of_reset_control_get_by_index(node, index);
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}
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EXPORT_SYMBOL_GPL(of_reset_control_get);
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