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

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>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index b49b706c0020..d83ea96fe135 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -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 */