6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Leon Romanovsky <leonro@nvidia.com>
[ Upstream commit a12d9145145b21c50531afb6e3f711b1f34e1465 ]
The eRDMA device interface requires explicit byte ordering, but several
DMA-visible values that should be little-endian remain native-endian.
Command request payloads are copied verbatim, data-path SQE headers are
written without cpu_to_le64(), and kernel doorbell records are assigned
plain u64 values. The command completion path also reads a little-endian
SQE header without conversion.
These paths are byte-swapped on big-endian kernels and can break command
processing during probe. Since complete big-endian support requires
converting every device-visible structure, depend on !CPU_BIG_ENDIAN.
Fixes: ca7fd6cff3b8 ("RDMA/erdma: Add driver to kernel build environment")
Link: https://patch.msgid.link/20260806-missing-endianness-conversion-for-64-v1-1-896327c1aff1@nvidia.com (local)
Acked-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/erdma/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/erdma/Kconfig b/drivers/infiniband/hw/erdma/Kconfig
index 169038e3ceb12..c90f2be1ea63d 100644
--- a/drivers/infiniband/hw/erdma/Kconfig
+++ b/drivers/infiniband/hw/erdma/Kconfig
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config INFINIBAND_ERDMA
tristate "Alibaba Elastic RDMA Adapter (ERDMA) support"
- depends on PCI_MSI && 64BIT
+ depends on PCI_MSI && 64BIT && !CPU_BIG_ENDIAN
depends on INFINIBAND_ADDR_TRANS
depends on INFINIBAND_USER_ACCESS
help
--
2.53.0