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| author | Manoj N. Kumar <manoj@linux.vnet.ibm.com> | 2016-03-04 15:55:14 -0600 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-03-08 21:17:33 -0500 |
| commit | 961487e46a87079a573348896a0d39c1cb10947d (patch) | |
| tree | c605ca80ba8f4883a8546e64bb73f362b5689527 /fs/btrfs/dev-replace.c | |
| parent | e729b50307bfe9c541d08dd591c1dd6aef1999e8 (diff) | |
cxlflash: Simplify PCI registration
The calls to pci_request_regions(), pci_resource_start(),
pci_set_dma_mask(), pci_set_master() and pci_save_state() are all
unnecessary for the IBM CXL flash adapter since data buffers
are not required to be mapped to the device's memory.
The use of services such as pci_set_dma_mask() are problematic on
hypervisor managed systems as the IBM CXL flash adapter is operating
under a virtual PCI Host Bridge (virtual PHB) which does not support
these services.
cxlflash 0001:00:00.0: init_pci: Failed to set PCI DMA mask rc=-5
The resolution is to simplify init_pci(), to a point where it does the
bare minimum (pci_enable_device). Similarly, remove the call the
pci_release_regions() from cxlflash_remove().
Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
0 files changed, 0 insertions, 0 deletions