From: Martin Jocic <martin.jocic@xxxxxxxxxx> 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> Link: https://patch.msgid.link/d7340f78e3db305bfeeb8229d2dd1c9077e10b92.1725875278.git.martin.jocic@xxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- 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 9ffc3ffb4e8f..f86c9671a03a 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, -- 2.45.2
