scsi: mpt3sas: Force reply post buffer allocations to be within same 4 GB region

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According to the MPI specification, reply post 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/20210305102904.7560-6-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>

...

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Suganath Prabu S 2021-03-05 15:59:02 +05:30 • committed by Martin K. Petersen

parent 58501fd937

commit 2e4e858732

1 changed files with 42 additions and 17 deletions

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drivers/scsi/mpt3sas/mpt3sas_base.c

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