On Wed, Jul 31, 2019 at 05:58:48AM -0400, Suganath Prabu wrote:
From: Suganath Prabu S suganath-prabu.subramani@broadcom.com
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.
Fix: Driver will set 63-bit DMA mask to ensure the above address will not be used.
Cc: stable@vger.kernel.org # 4.4.186, # 4.9.186 Signed-off-by: Suganath Prabu S suganath-prabu.subramani@broadcom.com
Note: This Patch is for stable kernel 4.4.186 and 4.9.186. Original patch is applied to 5.3/scsi-fixes. commit ID: df9a606184bfdb5ae3ca9d226184e9489f5c24f7
We can't do anything with this for a stable release until it hits Linus's kernel tree. Please wait until then to send backports.
thanks,
greg k-h