| Message ID | 1544443462-28736-2-git-send-email-smasetty@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] drm/msm/adreno: Make adreno_gpu_state_get() return void | expand |
On Mon, Dec 10, 2018 at 05:34:22PM +0530, Sharat Masetty wrote: > The gpu crashstate's base objects registers pointer can be NULL if the > target implementation decides to capture the register dump on its own. > This patch simply checks for NULL before dereferencing. > > Signed-off-by: Sharat Masetty <smasetty@codeaurora.org> > --- > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 40bcf32..a39cebc 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -415,6 +415,9 @@ void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) > } > } > > + if (!adreno_gpu->registers) > + return; > + This looks good - we should get it in the 4.21 pull. > /* Count the number of registers */ > for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) > count += adreno_gpu->registers[i + 1] - > @@ -550,12 +553,14 @@ void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state, > } > } > > - drm_puts(p, "registers:\n"); > + if (state->nr_registers > 0) { > + drm_puts(p, "registers:\n"); > > - for (i = 0; i < state->nr_registers; i++) { > - drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", > - state->registers[i * 2] << 2, > - state->registers[(i * 2) + 1]); > + for (i = 0; i < state->nr_registers; i++) { > + drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", > + state->registers[i * 2] << 2, > + state->registers[(i * 2) + 1]); > + } I don't think we need the extra indentation here - something like for (i = 0; i < state->nr_registers; i++) { + if (i == 0) + drm_puts(p, "Registers:\n"); drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", would suffice since we won't go into the loop if state->nr_registers == 0. Jordan
On Mon, Dec 10, 2018 at 05:34:22PM +0530, Sharat Masetty wrote: > The gpu crashstate's base objects registers pointer can be NULL if the > target implementation decides to capture the register dump on its own. > This patch simply checks for NULL before dereferencing. Hi Sharat - this doesn't apply against msm-next - it looks like a similar fix has already been done. Jordan > Signed-off-by: Sharat Masetty <smasetty@codeaurora.org> > --- > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 40bcf32..a39cebc 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -415,6 +415,9 @@ void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) > } > } > > + if (!adreno_gpu->registers) > + return; > + > /* Count the number of registers */ > for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) > count += adreno_gpu->registers[i + 1] - > @@ -550,12 +553,14 @@ void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state, > } > } > > - drm_puts(p, "registers:\n"); > + if (state->nr_registers > 0) { > + drm_puts(p, "registers:\n"); > > - for (i = 0; i < state->nr_registers; i++) { > - drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", > - state->registers[i * 2] << 2, > - state->registers[(i * 2) + 1]); > + for (i = 0; i < state->nr_registers; i++) { > + drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", > + state->registers[i * 2] << 2, > + state->registers[(i * 2) + 1]); > + } > } > } > #endif > -- > 1.9.1 >
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 40bcf32..a39cebc 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -415,6 +415,9 @@ void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) } } + if (!adreno_gpu->registers) + return; + /* Count the number of registers */ for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) count += adreno_gpu->registers[i + 1] - @@ -550,12 +553,14 @@ void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state, } } - drm_puts(p, "registers:\n"); + if (state->nr_registers > 0) { + drm_puts(p, "registers:\n"); - for (i = 0; i < state->nr_registers; i++) { - drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", - state->registers[i * 2] << 2, - state->registers[(i * 2) + 1]); + for (i = 0; i < state->nr_registers; i++) { + drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", + state->registers[i * 2] << 2, + state->registers[(i * 2) + 1]); + } } } #endif
The gpu crashstate's base objects registers pointer can be NULL if the target implementation decides to capture the register dump on its own. This patch simply checks for NULL before dereferencing. Signed-off-by: Sharat Masetty <smasetty@codeaurora.org> --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)