diff options
| author | Suganath Prabu <suganath-prabu.subramani@broadcom.com> | 2019-07-30 03:43:57 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-25 10:50:01 +0200 |
| commit | 25f99d0072600573e64d30c3a1aeda710e4c2571 (patch) | |
| tree | 9dee68e9b52d36e3b77b70299440aa5ed7353c55 /arch/sh | |
| parent | 45f092f9e9cb31486db546e39bfe7cc0b3f57099 (diff) | |
scsi: mpt3sas: Use 63-bit DMA addressing on SAS35 HBA
commit df9a606184bfdb5ae3ca9d226184e9489f5c24f7 upstream.
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: <stable@vger.kernel.org> # 5.1.20+
Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/sh')
0 files changed, 0 insertions, 0 deletions