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Subject: [PATCH 4/6] drm/amdgpu: Limit info in coredump for kernel threads
Date:   Tue, 11 Jul 2023 18:34:59 -0300
Message-ID: <20230711213501.526237-5-andrealmeid@igalia.com>
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If a kernel thread caused the reset, the information available to be
logged will be limited, so return early in the dump function.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 23b9784e9787..7449aead1e13 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4988,10 +4988,14 @@ static ssize_t amdgpu_devcoredump_read(char *buffer, loff_t offset,
 	drm_printf(&p, "kernel: " UTS_RELEASE "\n");
 	drm_printf(&p, "module: " KBUILD_MODNAME "\n");
 	drm_printf(&p, "time: %lld.%09ld\n", coredump->reset_time.tv_sec, coredump->reset_time.tv_nsec);
-	if (coredump->reset_task_info.pid)
+	if (coredump->reset_task_info.pid) {
 		drm_printf(&p, "process_name: %s PID: %d\n",
 			   coredump->reset_task_info.process_name,
 			   coredump->reset_task_info.pid);
+	} else {
+		drm_printf(&p, "GPU reset caused by a kernel thread\n");
+		return count - iter.remain;
+	}
 
 	if (coredump->reset_vram_lost)
 		drm_printf(&p, "VRAM is lost due to GPU reset!\n");
-- 
2.41.0