Commit 4690a75c authored by Suganath Prabu S's avatar Suganath Prabu S Committed by Hao Zhang
Browse files

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

stable inclusion
from stable-v5.10.146
commit e7fafef9830c4a01e60f76e3860a9bef0262378d
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8AGBT
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=e7fafef9830c4a01e60f76e3860a9bef0262378d

--------------------------------

[ 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: default avatarSuganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: e0e0747d ("scsi: mpt3sas: Fix return value check of dma_get_required_mask()")
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarHao Zhang <Hao.Zhang@windriver.com>
parent 11204f3c
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