[PATCH rdma-next] RDMA/erdma: restrict the driver to little-endian systems
Leon Romanovsky <[email protected]>
| Newsgroups | org.kernel.vger.linux-rdma,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <20260806-missing-endianness-conversion-for-64-v1-1-896327c1aff1@nvidia.com> |
From: Leon Romanovsky <[email protected]> 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") Signed-off-by: Leon Romanovsky <[email protected]> --- RDMA/erdma: restrict the driver to little-endian systems --- 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 267fc1f3c42a..745e5551773f 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 --- base-commit: 961ac0f0c5e414abdd6b33fae84b311d9fde0bd0 change-id: 20260806-missing-endianness-conversion-for-64-f0af69246071 Best regards, -- Leon Romanovsky <[email protected]>