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[SCSI] mpt fusion: Request I/O resources only when required

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This patch modifies the I/O resource allocation behavior of FUSION
driver.  The current version of driver allocates the I/O resources
even if they are not required and this creates trouble in low resource
environments.  This driver now uses
pci_enable_device_mem/pci_enable_device functions to differentiate the
resource allocations.

Signed-off-by: Sathya Prakash <sathya.prakash@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Prakash, Sathya 2008-02-08 22:05:35 +05:30 • committed by James Bottomley
parent 2f7ecc55b3
commit e78d5b8f1e
2 changed files with 44 additions and 7 deletions
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1
drivers/message/fusion/mptbase.h
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@ -629,6 +629,7 @@ typedef struct _MPT_ADAPTER
dma_addr_t HostPageBuffer_dma;
int mtrr_reg;
struct pci_dev *pcidev; /* struct pci_dev pointer */
int bars; /* bitmask of BAR's that must be configured */
u8 __iomem *memmap; /* mmap address */
struct Scsi_Host *sh; /* Scsi Host pointer */
SpiCfgData spi_data; /* Scsi config. data */