Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-15 15:41:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

scsi: lpfc: Use sg_dma_address() and sg_dma_len() macros for NVMe I/O

Browse Source 
NVMe I/O problems may be seen on IOMMU enabled platforms. Adapter I/Os
failing with transfer length mismatches.

The sg list processing routine for NVMe I/O is accessing the sg entry
directly for the length and address fields. On some IOMMU platforms,
contigous mappings are compressed to the first sg entry with the sum of the
lengths set to the sg entry dma_length field. The length fields are left
for later use by the unmap call. As such, the driver didn't see the actual
dma_length value, just the first entries length value.  Drivers are to use
the sg_dma_length() and sg_dma_address() macros to reference the sg
entry. The macros select the proper length field (dma_length or length) to
reference.

Fix the offending code to use the sg_dma_xxx macros.

Link: https://lore.kernel.org/r/20220506035519.50908-12-jsmart2021@gmail.com
Tested-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Co-developed-by: Nigel Kirkland <nkirkland2304@gmail.com>
Signed-off-by: Nigel Kirkland <nkirkland2304@gmail.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2022-05-05 20:55:18 -07:00 committed by Martin K. Petersen
parent e6f5104145
commit a14396b6d1
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/lpfc/lpfc_nvme.c
View File

@ -1401,8 +1401,8 @@ lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
if ((nseg - 1) == i)
bf_set(lpfc_sli4_sge_last, sgl, 1);
physaddr = data_sg->dma_address;
dma_len = data_sg->length;
physaddr = sg_dma_address(data_sg);
dma_len = sg_dma_len(data_sg);
sgl->addr_lo = cpu_to_le32(
putPaddrLow(physaddr));
sgl->addr_hi = cpu_to_le32(