[PATCH v2] staging: vc04_services: setup DMA and coherent mask
From: Michael Zoran <hidden>
Date: 2016-10-31 21:02:16
Also in:
lkml
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
VCHI messages between the CPU and firmware use 32-bit bus addresses. Explicitly set the DMA mask and coherent on all platforms. Signed-off-by: Michael Zoran <redacted> --- .../staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index a5afcc5..ba77fd8 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c@@ -97,6 +97,15 @@ int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state) int slot_mem_size, frag_mem_size; int err, irq, i; + /* + * VCHI messages between the CPU and firmware use + * 32-bit bus addresses. + */ + err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + + if (err < 0) + return err; + (void)of_property_read_u32(dev->of_node, "cache-line-size", &g_cache_line_size); g_fragments_size = 2 * g_cache_line_size;
--
2.10.1