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authorRob Herring <robh@kernel.org>2017-01-16 14:28:39 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-22 09:23:21 +0100
commit60872f9e197cfb13eb11ab31bdf6a149e228ee3c (patch)
tree97b82b9c38c29492a16506252185afa01bf05567 /drivers/of
parent2d59be48a99480ef920f4df4a4de010590c0f634 (diff)
of: fix of_device_get_modalias returned length when truncating buffers
[ Upstream commit bcf54d5385abaea9c8026aae6f4eeb348671a52d ] If the length of the modalias is greater than the buffer size, then the modalias is truncated. However the untruncated length is returned which will cause an error. Fix this to return the truncated length. If an error in the case was desired, then then we should just return -ENOMEM. The reality is no device will ever have 4KB of compatible strings to hit this case. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/device.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 97a280d50d6d..7c509bff9295 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -223,7 +223,7 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
str[i] = '_';
}
- return tsize;
+ return repend;
}
EXPORT_SYMBOL_GPL(of_device_get_modalias);