From 8dec6bd4ef327f48eb790a48cba0e833109d4e41 Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Mon, 19 Aug 2019 16:29:01 +0200 Subject: [PATCH] s390/pci: avoid using strncmp with hardcoded length 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 --- arch/s390/pci/pci_dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 9e52d1527f71..fb2c7db0164e 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -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);