From: Dikshita Agarwal <quic_dikshita@quicinc.com>
Date: Wed, 6 Mar 2024 05:53:26 +0000 (+0530)
Subject: media: venus: avoid multiple core dumps
X-Git-Tag: v6.11-rc1~142^2~24
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=02e92ea83b9166b87771c90c76754bd661c5645f;p=thirdparty%2Flinux.git

media: venus: avoid multiple core dumps

Core dump is generated whenever there is system error reported
by firmware. Right now, multiple such dumps are generated if
recovery fails in first attempt, since the sys error handler is
invoked again for every failed recovery.
To avoid it, add conditional check to generate core dump only
once during every system error notification from firmware.

Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: document new dump_core field]
---

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index ce206b7097541..af8890fd6ec27 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -68,6 +68,7 @@ static void venus_event_notify(struct venus_core *core, u32 event)
 
 	mutex_lock(&core->lock);
 	set_bit(0, &core->sys_error);
+	set_bit(0, &core->dump_core);
 	list_for_each_entry(inst, &core->instances, list)
 		inst->ops->event_notify(inst, EVT_SESSION_ERROR, NULL);
 	mutex_unlock(&core->lock);
@@ -110,7 +111,10 @@ static void venus_sys_error_handler(struct work_struct *work)
 
 	venus_shutdown(core);
 
-	venus_coredump(core);
+	if (test_bit(0, &core->dump_core)) {
+		venus_coredump(core);
+		clear_bit(0, &core->dump_core);
+	}
 
 	pm_runtime_put_sync(core->dev);
 
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 6a77de3744543..55202b89e1b9f 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -169,6 +169,7 @@ struct venus_format {
  * @core1_usage_count: usage counter for core1
  * @root:	debugfs root directory
  * @venus_ver:	the venus firmware version
+ * @dump_core:	a flag indicating that a core dump is required
  */
 struct venus_core {
 	void __iomem *base;
@@ -232,6 +233,7 @@ struct venus_core {
 		u32 minor;
 		u32 rev;
 	} venus_ver;
+	unsigned long dump_core;
 };
 
 struct vdec_controls {