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serial: amba-pl011: Fix devm_ioremap_resource return value check

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Value returned by devm_ioremap_resource() was checked for non-NULL but
devm_ioremap_resource() returns IOMEM_ERR_PTR, not NULL. In case of
error this could lead to dereference of ERR_PTR.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Cc: <stable@vger.kernel.org>
Fixes: 3873e2d7f6 ("drivers: PL011: refactor pl011_probe()")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski 2015-07-09 22:21:41 +09:00 committed by Greg Kroah-Hartman
parent 3b19e03229
commit 97a60eac33
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/amba-pl011.c
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@ -2310,8 +2310,8 @@ static int pl011_setup_port(struct device *dev, struct uart_amba_port *uap,
void __iomem *base;
base = devm_ioremap_resource(dev, mmiobase);
if (!base)
return -ENOMEM;
if (IS_ERR(base))
return PTR_ERR(base);
index = pl011_probe_dt_alias(index, dev);