scsi: qla2xxx: Add boundary checks for exchanges to be offloaded
Max boundary for exchange off load is 32k exchanges. If a system is unable to allocate large memory buffer to support this feature, then driver will reduce the number of exchanges down to a value system can support. Signed-off-by: NQuinn Tran <quinn.tran@cavium.com> Signed-off-by: NHimanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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