linux/drivers/scsi/cxlflash
Manoj N. Kumar 961487e46a 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>
2016-03-08 21:17:33 -05:00
..
common.h cxlflash: Resolve oops in wait_port_offline 2016-01-06 20:55:01 -05:00
Kconfig
lunmgt.c cxlflash: Fix to avoid corrupting port selection mask 2015-10-30 17:23:55 +09:00
main.c cxlflash: Simplify PCI registration 2016-03-08 21:17:33 -05:00
main.h cxlflash: Enable device id for future IBM CXL adapter 2016-01-06 20:58:29 -05:00
Makefile cxlflash: Virtual LUN support 2015-08-26 18:05:39 -07:00
sislite.h cxlflash: Correct spelling, grammar, and alignment mistakes 2015-10-30 17:18:28 +09:00
superpipe.c cxlflash: drop unlikely before IS_ERR_OR_NULL 2015-12-10 12:55:37 -05:00
superpipe.h cxlflash: Fix to avoid corrupting port selection mask 2015-10-30 17:23:55 +09:00
vlun.c cxlflash: Fix to avoid virtual LUN failover failure 2016-01-06 20:50:08 -05:00
vlun.h cxlflash: Virtual LUN support 2015-08-26 18:05:39 -07:00