media: iris: Fix memory leak by freeing untracked persist buffer

One internal buffer which is allocated only once per session was not
being freed during session close because it was not being tracked as
part of internal buffer list which resulted in a memory leak.

Add the necessary logic to explicitly free the untracked internal buffer
during session close to ensure all allocated memory is released
properly.

Fixes: 73702f45db81 ("media: iris: allocate, initialize and queue internal buffers")
Cc: stable@vger.kernel.org
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Tested-by: Vikash Garodia <quic_vgarodia@quicinc.com> # X1E80100
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # x1e80100-crd
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/qcom/iris/iris_buffer.c b/drivers/media/platform/qcom/iris/iris_buffer.c
index 6425e4919e3b0b849ba801ca9e01921c114144cd..9f664c241149362d44d3a8fa65e2266f9c2e80e0 100644 (file)
--- a/drivers/media/platform/qcom/iris/iris_buffer.c
+++ b/drivers/media/platform/qcom/iris/iris_buffer.c
@@ -413,6 +413,16 @@ static int iris_destroy_internal_buffers(struct iris_inst *inst, u32 plane, bool
                }
        }
 
+       if (force) {
+               buffers = &inst->buffers[BUF_PERSIST];
+
+               list_for_each_entry_safe(buf, next, &buffers->list, list) {
+                       ret = iris_destroy_internal_buffer(inst, buf);
+                       if (ret)
+                               return ret;
+               }
+       }
+
        return 0;
 }