Commit 771e153f authored by Nicholas Mc Guire's avatar Nicholas Mc Guire Committed by Greg Kroah-Hartman

gpio: pl061: handle failed allocations

[ Upstream commit df209c43 ]

devm_kzalloc(), devm_kstrdup() and devm_kasprintf() all can
fail internal allocation and return NULL. Using any of the assigned
objects without checking is not safe. As this is early in the boot
phase and these allocations really should not fail, any failure here
is probably an indication of a more serious issue so it makes little
sense to try and rollback the previous allocated resources or try to
continue;  but rather the probe function is simply exited with -ENOMEM.
Signed-off-by: default avatarNicholas Mc Guire <hofrat@osadl.org>
Fixes: 684284b6 ("ARM: integrator: add MMCI device to IM-PD1")
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent e18ea11e
......@@ -393,7 +393,11 @@ static int __ref impd1_probe(struct lm_device *dev)
sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
GFP_KERNEL);
chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id);
mmciname = devm_kasprintf(&dev->dev, GFP_KERNEL,
"lm%x:00700", dev->id);
if (!lookup || !chipname || !mmciname)
return -ENOMEM;
lookup->dev_id = mmciname;
/*
* Offsets on GPIO block 1:
......
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