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misc: sram: fix check of devm_ioremap*() return value 

Both devm_ioremap() and devm_ioremap_wc() functions return either
a pointer to valid iomem region or NULL, check for IS_ERR() is improper
and may result in oops on error path. Now on error -ENOMEM is returned.

Fixes: 0ab163ad1e ("misc: sram: switch to ioremap_wc from ioremap")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vladimir Zapolskiy 2016-03-23 04:52:45 +02:00 committed by Greg Kroah-Hartman
parent 47f55b74cf
commit d449d69d21
1 changed files with 2 additions and 2 deletions
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4
drivers/misc/sram.c
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@ -364,8 +364,8 @@ static int sram_probe(struct platform_device *pdev)
sram->virt_base = devm_ioremap(sram->dev, res->start, size);
else
sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);
if (IS_ERR(sram->virt_base))
return PTR_ERR(sram->virt_base);
if (!sram->virt_base)
return -ENOMEM;
sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),
NUMA_NO_NODE, NULL);