scsi: mpt3sas: Force PCIe scatterlist allocations to be within same 4 GB region

[ Upstream commit d6adc251 ]

According to the MPI specification, PCIe SGL buffers can not cross a 4 GB
boundary.

While allocating, if any buffer crosses the 4 GB boundary, then:

 - Release the already allocated memory pools; and

 - Reallocate them by changing the DMA coherent mask to 32-bit

Link: https://lore.kernel.org/r/20210305102904.7560-2-suganath-prabu.subramani@broadcom.com


Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: e0e0747d ("scsi: mpt3sas: Fix return value check of dma_get_required_mask()")
Signed-off-by: Sasha Levin <sashal@kernel.org>