Enabling 64-bit addressing for DMA buffers will prevent issues on some memory constrained platforms like e.g. Raspberry Pi 5, where the driver won't load because it cannot allocate enough continuous memory in the default 32-bit memory address range. Signed-off-by: Martin Jocic <martin.jocic@xxxxxxxxxx> --- Changes in v2: * Use IS_ENABLED() macro instead of #ifdef. Changes in v3: * Apply unconditionally, do not check OS-version. Link: https://lore.kernel.org/linux-can/20240830131724.7c08eac4@xxxxxxxxxx/ --- drivers/net/can/kvaser_pciefd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c index 9283408d1b29..fee012b57f33 100644 --- a/drivers/net/can/kvaser_pciefd.c +++ b/drivers/net/can/kvaser_pciefd.c @@ -1104,6 +1104,9 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie) /* Disable the DMA */ iowrite32(0, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CTRL_REG); + + dma_set_mask_and_coherent(&pcie->pci->dev, DMA_BIT_MASK(64)); + for (i = 0; i < KVASER_PCIEFD_DMA_COUNT; i++) { pcie->dma_data[i] = dmam_alloc_coherent(&pcie->pci->dev, KVASER_PCIEFD_DMA_SIZE, -- 2.43.0
