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>
---
drivers/net/can/kvaser_pciefd.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index a60d9efd5f8d..5885f1ce189d 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -1104,6 +1104,11 @@ 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);
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ dma_set_mask_and_coherent(&pcie->pci->dev, DMA_BIT_MASK(64));
+#endif
+
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
