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| author | Suganath Prabu <[email protected]> | 2019-07-30 07:43:57 +0000 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2019-07-30 16:46:06 +0000 |
| commit | df9a606184bfdb5ae3ca9d226184e9489f5c24f7 (patch) | |
| tree | 02a6dfc7230096d05565df8e7eea5dae557eae7a /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | scsi: hpsa: remove printing internal cdb on tag collision (diff) | |
| download | kernel-df9a606184bfdb5ae3ca9d226184e9489f5c24f7.tar.gz kernel-df9a606184bfdb5ae3ca9d226184e9489f5c24f7.zip | |
scsi: mpt3sas: Use 63-bit DMA addressing on SAS35 HBA
Although SAS3 & SAS3.5 IT HBA controllers support 64-bit DMA addressing, as
per hardware design, if DMA-able range contains all 64-bits
set (0xFFFFFFFF-FFFFFFFF) then it results in a firmware fault.
E.g. SGE's start address is 0xFFFFFFFF-FFFF000 and data length is 0x1000
bytes. when HBA tries to DMA the data at 0xFFFFFFFF-FFFFFFFF location then
HBA will fault the firmware.
Driver will set 63-bit DMA mask to ensure the above address will not be
used.
Cc: <[email protected]> # 5.1.20+
Signed-off-by: Suganath Prabu <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions