dev may be NULL, e.g. when
dma_sync_single_for_cpu(NULL,
is called. Such instances are broken anyway, but we still have them,
e.g. in Raspberry Pi code for mailbox, so add a NULL check.
Fixes qemu-rpi0@multi_v7 CI breakage on next.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
include/driver.h | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/include/driver.h b/include/driver.h
index c23404ca16fb..43d002f66dbe 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -730,13 +730,15 @@ static inline struct device_node *dev_of_node(struct device *dev)
static inline bool dev_is_dma_coherent(struct device *dev)
{
- switch (dev->dma_coherent) {
- case DEV_DMA_NON_COHERENT:
- return false;
- case DEV_DMA_COHERENT:
- return true;
- case DEV_DMA_COHERENCE_DEFAULT:
- break;
+ if (dev) {
+ switch (dev->dma_coherent) {
+ case DEV_DMA_NON_COHERENT:
+ return false;
+ case DEV_DMA_COHERENT:
+ return true;
+ case DEV_DMA_COHERENCE_DEFAULT:
+ break;
+ }
}
return IS_ENABLED(CONFIG_ARCH_DMA_DEFAULT_COHERENT);
--
2.39.2
