diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-15 15:00:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-15 15:00:11 +0100 |
| commit | c182ce9bc8c85a623c71a23bcd6768045126c289 (patch) | |
| tree | 73fb6561bbec5d89cba74492c149f3012e275afa /arch/s390/pci/pci_dma.c | |
| parent | 2da050e4f151c458df909780843067e7c2d11ec2 (diff) | |
| parent | a8750ddca918032d6349adbf9a4b6555e7db20da (diff) | |
| download | linux-c182ce9bc8c85a623c71a23bcd6768045126c289.tar.bz2 | |
Merge 4.15-rc8 into usb-next
We want the USB fixes in here as well for merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/s390/pci/pci_dma.c')
| -rw-r--r-- | arch/s390/pci/pci_dma.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index f7aa5a77827e..2d15d84c20ed 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -181,6 +181,9 @@ out_unlock: static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr, size_t size, int flags) { + unsigned long irqflags; + int ret; + /* * With zdev->tlb_refresh == 0, rpcit is not required to establish new * translations when previously invalid translation-table entries are @@ -196,8 +199,22 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr, return 0; } - return zpci_refresh_trans((u64) zdev->fh << 32, dma_addr, - PAGE_ALIGN(size)); + ret = zpci_refresh_trans((u64) zdev->fh << 32, dma_addr, + PAGE_ALIGN(size)); + if (ret == -ENOMEM && !s390_iommu_strict) { + /* enable the hypervisor to free some resources */ + if (zpci_refresh_global(zdev)) + goto out; + + spin_lock_irqsave(&zdev->iommu_bitmap_lock, irqflags); + bitmap_andnot(zdev->iommu_bitmap, zdev->iommu_bitmap, + zdev->lazy_bitmap, zdev->iommu_pages); + bitmap_zero(zdev->lazy_bitmap, zdev->iommu_pages); + spin_unlock_irqrestore(&zdev->iommu_bitmap_lock, irqflags); + ret = 0; + } +out: + return ret; } static int dma_update_trans(struct zpci_dev *zdev, unsigned long pa, |