kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-12 06:01:58 +00:00
Code Issues Releases Packages Activity
linux/drivers/vfio/pci
History
Alexey Kardashevskiy f9df37019e vfio/spapr/nvlink2: Skip unpinning pages on error exit 
[ Upstream commit 338b4e10f9 ]

The nvlink2 subdriver for IBM Witherspoon machines preregisters
GPU memory in the IOMMI API so KVM TCE code can map this memory
for DMA as well. This is done by mm_iommu_newdev() called from
vfio_pci_nvgpu_regops::mmap.

In an unlikely event of failure the data->mem remains NULL and
since mm_iommu_put() (which unregisters the region and unpins memory
if that was regular memory) does not expect mem=NULL, it should not be
called.

This adds a check to only call mm_iommu_put() for a valid data->mem.

Fixes: 7f92891778 ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2020-02-24 08:38:23 +01:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
trace.h vfio/pci: Cleanup license mess 2019-01-22 11:06:05 -07:00
vfio_pci.c PCI: Add PCI_STD_NUM_BARS for the number of standard BARs 2019-10-14 10:22:26 -05:00
vfio_pci_config.c PCI: Add PCI_STD_NUM_BARS for the number of standard BARs 2019-10-14 10:22:26 -05:00
vfio_pci_igd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vfio_pci_intrs.c vfio/pci: call irq_bypass_unregister_producer() before freeing irq 2019-12-02 14:34:41 -07:00
vfio_pci_nvlink2.c vfio/spapr/nvlink2: Skip unpinning pages on error exit 2020-02-24 08:38:23 +01:00
vfio_pci_private.h PCI: Add PCI_STD_NUM_BARS for the number of standard BARs 2019-10-14 10:22:26 -05:00
vfio_pci_rdwr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00