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s390/pci: avoid using strncmp with hardcoded length

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Command line option values passed to __setup callbacks are always
null-terminated and "s390_iommu=" may only accept "strict" as value.
So replace strncmp with strcmp.

While at it also make s390_iommu_setup return 1, which means this
command line option is handled by this callback.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2019-08-19 16:29:01 +02:00
parent 759d4899d9
commit 8dec6bd4ef
1 changed files with 2 additions and 2 deletions
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4
arch/s390/pci/pci_dma.c
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@ -674,9 +674,9 @@ EXPORT_SYMBOL_GPL(s390_pci_dma_ops);
static int __init s390_iommu_setup(char *str)
{
if (!strncmp(str, "strict", 6))
if (!strcmp(str, "strict"))
s390_iommu_strict = 1;
return 0;
return 1;
}
__setup("s390_iommu=", s390_iommu_setup);