gpu: nvgpu: More verbose BAR1 failure message

Change-Id: Ie575aa3eeea8ebddf5778be0d03cf9744ec35540
Signed-off-by: Rich Wiley <rwiley@nvidia.com>
Reviewed-on: http://git-master/r/760860
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 731074de..034d060a 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -590,14 +590,16 @@ static int gk20a_init_fifo_setup_hw(struct gk20a *g)
                 smp_mb();
 
                 if (v1 != gk20a_bar1_readl(g, bar1_vaddr)) {
-                        gk20a_err(dev_from_gk20a(g), "bar1 broken @ gk20a!");
+                        gk20a_err(dev_from_gk20a(g), "bar1 broken @ gk20a: CPU wrote 0x%x, \
+                                GPU read 0x%x", *cpu_vaddr, gk20a_bar1_readl(g, bar1_vaddr));
                         return -EINVAL;
                 }
 
                 gk20a_bar1_writel(g, bar1_vaddr, v2);
 
                 if (v2 != gk20a_bar1_readl(g, bar1_vaddr)) {
-                        gk20a_err(dev_from_gk20a(g), "bar1 broken @ gk20a!");
+                        gk20a_err(dev_from_gk20a(g), "bar1 broken @ gk20a: GPU wrote 0x%x, \
+                                CPU read 0x%x", gk20a_bar1_readl(g, bar1_vaddr), *cpu_vaddr);
                         return -EINVAL;
                 }