During debugging we have seen an issue where axi_chan_dump_lli()
is passed a NULL LLI pointer which ends up causing an OOPS due
to trying to get fields from it. Simply print NULL LLI and exit
to avoid this.
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxx>
---
drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 75c537153e92..d6ef5f49f281 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -1008,6 +1008,11 @@ static void axi_chan_dump_regs(struct axi_dma_chan *chan)
static void axi_chan_dump_lli(struct axi_dma_chan *chan,
struct axi_dma_hw_desc *desc)
{
+ if (!desc->lli) {
+ dev_err(dchan2dev(&chan->vc.chan), "NULL LLI\n");
+ return;
+ }
+
dev_err(dchan2dev(&chan->vc.chan),
"SAR: 0x%llx DAR: 0x%llx LLP: 0x%llx BTS 0x%x CTL: 0x%x:%08x",
le64_to_cpu(desc->lli->sar),
--
2.35.1
