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authorChristoph Hellwig <hch@lst.de>2018-04-27 09:31:47 +0200
committerChristoph Hellwig <hch@lst.de>2018-05-28 12:48:21 +0200
commit098afd981744061d37eb4d40bc3f755438570afb (patch)
treee9086d4732a6c381a03406f4331a8477e2a780a7 /arch/x86/kernel
parent06e9552f5f12564dc1c3483f0934d96cc4f72f18 (diff)
x86/pci-dma: remove the explicit nodac and allowdac option
This is something drivers should decide (modulo chipset quirks like for VIA), which as far as I can tell is how things have been handled for the last 15 years. Note that we keep the usedac option for now, as it is used in the wild to override the too generic VIA quirk. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/pci-dma.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index b65b0d7072f1..b523414bc323 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -122,9 +122,9 @@ static __init int iommu_setup(char *p)
if (!strncmp(p, "forcesac", 8))
pr_warn("forcesac option ignored.\n");
if (!strncmp(p, "allowdac", 8))
- forbid_dac = 0;
+ pr_warn("allowdac option ignored.\n");
if (!strncmp(p, "nodac", 5))
- forbid_dac = 1;
+ pr_warn("nodac option ignored.\n");
if (!strncmp(p, "usedac", 6)) {
forbid_dac = -1;
return 1;