From: Petr Tesarik <[email protected]> If swiotlb is allocated, immediately return 0, so callers do not have to check io_tlb_default_mem.nslabs explicitly.
Signed-off-by: Petr Tesarik <[email protected]> --- arch/arm/xen/mm.c | 10 ++++------ kernel/dma/swiotlb.c | 3 +++ 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index 3d826c0b5fee..882cd70c7a2f 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -125,12 +125,10 @@ static int __init xen_mm_init(void) return 0; /* we can work with the default swiotlb */ - if (!io_tlb_default_mem.nslabs) { - rc = swiotlb_init_late(swiotlb_size_or_default(), - xen_swiotlb_gfp(), NULL); - if (rc < 0) - return rc; - } + rc = swiotlb_init_late(swiotlb_size_or_default(), + xen_swiotlb_gfp(), NULL); + if (rc < 0) + return rc; cflush.op = 0; cflush.a.dev_bus_addr = 0; diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 1c0a49e6685a..ee57fd9949dc 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -384,6 +384,9 @@ int swiotlb_init_late(size_t size, gfp_t gfp_mask, bool retried = false; int rc = 0; + if (io_tlb_default_mem.nslabs) + return 0; + if (swiotlb_force_disable) return 0; -- 2.25.1
