Changes since v2:
- Rebase on v6.1-rc1.
- Merge with the following series:
[1] https://patchwork.kernel.org/project/linux-mediatek/list/?series=683526
Changes since v1:
- Rename goto label in mdp_comp_clock_on() from "err_unwind"
to "err_revert" to make more readable.
Hi,
This series fixes some error handling in MDP3 in response to the bug report
submitted by Dan Carpenter (Message ID = YxB1E00e8D6P4W2e@kili)
Moudy Ho (3):
media: platform: mtk-mdp3: fix error handling in mdp_cmdq_send()
media: platform: mtk-mdp3: fix error handling about components
clock_on
media: platform: mtk-mdp3: fix error handling in mdp_probe()
.../platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 51 ++++++++++---------
.../platform/mediatek/mdp3/mtk-mdp3-comp.c | 24 ++++++---
.../platform/mediatek/mdp3/mtk-mdp3-core.c | 15 +++---
3 files changed, 53 insertions(+), 37 deletions(-)
--
2.18.0
Add goto statement in mdp_comp_clock_on() to avoid error code not being
propagated or returning positive values.
This change also performs a well-timed clock_off when an error occurs, and
reduces unnecessary error logging in mdp_cmdq_send().
Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
---
.../platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 4 +---
.../platform/mediatek/mdp3/mtk-mdp3-comp.c | 24 ++++++++++++++-----
2 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
index e194dec8050a..124c1b96e96b 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
@@ -433,10 +433,8 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
cmd->mdp_ctx = param->mdp_ctx;
ret = mdp_comp_clocks_on(&mdp->pdev->dev, cmd->comps, cmd->num_comps);
- if (ret) {
- dev_err(dev, "comp %d failed to enable clock!\n", ret);
+ if (ret)
goto err_free_path;
- }
dma_sync_single_for_device(mdp->cmdq_clt->chan->mbox->dev,
cmd->pkt.pa_base, cmd->pkt.cmd_buf_size,
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
index d3eaf8884412..7bc05f42a23c 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c
@@ -699,12 +699,22 @@ int mdp_comp_clock_on(struct device *dev, struct mdp_comp *comp)
dev_err(dev,
"Failed to enable clk %d. type:%d id:%d\n",
i, comp->type, comp->id);
- pm_runtime_put(comp->comp_dev);
- return ret;
+ goto err_revert;
}
}
return 0;
+
+err_revert:
+ while (--i >= 0) {
+ if (IS_ERR_OR_NULL(comp->clks[i]))
+ continue;
+ clk_disable_unprepare(comp->clks[i]);
+ }
+ if (comp->comp_dev)
+ pm_runtime_put_sync(comp->comp_dev);
+
+ return ret;
}
void mdp_comp_clock_off(struct device *dev, struct mdp_comp *comp)
@@ -723,11 +733,13 @@ void mdp_comp_clock_off(struct device *dev, struct mdp_comp *comp)
int mdp_comp_clocks_on(struct device *dev, struct mdp_comp *comps, int num)
{
- int i;
+ int i, ret;
- for (i = 0; i < num; i++)
- if (mdp_comp_clock_on(dev, &comps[i]) != 0)
- return ++i;
+ for (i = 0; i < num; i++) {
+ ret = mdp_comp_clock_on(dev, &comps[i]);
+ if (ret)
+ return ret;
+ }
return 0;
}
--
2.18.0
Increase and refine the goto label in mdp_cmdq_send() to avoid
double free and facilitate traceability.
Also, remove redundant work queue event in blocking function
mdp_cmdq_send().
Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
---
.../platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 47 ++++++++++---------
1 file changed, 26 insertions(+), 21 deletions(-)
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
index 86c054600a08..e194dec8050a 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
@@ -252,10 +252,9 @@ static int mdp_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt,
dma_addr_t dma_addr;
pkt->va_base = kzalloc(size, GFP_KERNEL);
- if (!pkt->va_base) {
- kfree(pkt);
+ if (!pkt->va_base)
return -ENOMEM;
- }
+
pkt->buf_size = size;
pkt->cl = (void *)client;
@@ -368,25 +367,30 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
ret = -ENOMEM;
- goto err_cmdq_data;
+ goto err_cancel_job;
}
- if (mdp_cmdq_pkt_create(mdp->cmdq_clt, &cmd->pkt, SZ_16K)) {
- ret = -ENOMEM;
- goto err_cmdq_data;
- }
+ ret = mdp_cmdq_pkt_create(mdp->cmdq_clt, &cmd->pkt, SZ_16K);
+ if (ret)
+ goto err_free_cmd;
comps = kcalloc(param->config->num_components, sizeof(*comps),
GFP_KERNEL);
if (!comps) {
ret = -ENOMEM;
- goto err_cmdq_data;
+ goto err_destroy_pkt;
}
path = kzalloc(sizeof(*path), GFP_KERNEL);
if (!path) {
ret = -ENOMEM;
- goto err_cmdq_data;
+ goto err_free_comps;
+ }
+
+ ret = mtk_mutex_prepare(mdp->mdp_mutex[MDP_PIPE_RDMA0]);
+ if (ret) {
+ dev_err(dev, "Fail to enable mutex clk\n");
+ goto err_free_path;
}
path->mdp_dev = mdp;
@@ -406,15 +410,13 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
ret = mdp_path_ctx_init(mdp, path);
if (ret) {
dev_err(dev, "mdp_path_ctx_init error\n");
- goto err_cmdq_data;
+ goto err_free_path;
}
- mtk_mutex_prepare(mdp->mdp_mutex[MDP_PIPE_RDMA0]);
-
ret = mdp_path_config(mdp, cmd, path);
if (ret) {
dev_err(dev, "mdp_path_config error\n");
- goto err_cmdq_data;
+ goto err_free_path;
}
cmdq_pkt_finalize(&cmd->pkt);
@@ -433,7 +435,7 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
ret = mdp_comp_clocks_on(&mdp->pdev->dev, cmd->comps, cmd->num_comps);
if (ret) {
dev_err(dev, "comp %d failed to enable clock!\n", ret);
- goto err_clock_off;
+ goto err_free_path;
}
dma_sync_single_for_device(mdp->cmdq_clt->chan->mbox->dev,
@@ -450,17 +452,20 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
return 0;
err_clock_off:
- mtk_mutex_unprepare(mdp->mdp_mutex[MDP_PIPE_RDMA0]);
mdp_comp_clocks_off(&mdp->pdev->dev, cmd->comps,
cmd->num_comps);
-err_cmdq_data:
+err_free_path:
+ mtk_mutex_unprepare(mdp->mdp_mutex[MDP_PIPE_RDMA0]);
kfree(path);
- atomic_dec(&mdp->job_count);
- wake_up(&mdp->callback_wq);
- if (cmd && cmd->pkt.buf_size > 0)
- mdp_cmdq_pkt_destroy(&cmd->pkt);
+err_free_comps:
kfree(comps);
+err_destroy_pkt:
+ mdp_cmdq_pkt_destroy(&cmd->pkt);
+err_free_cmd:
kfree(cmd);
+err_cancel_job:
+ atomic_dec(&mdp->job_count);
+
return ret;
}
EXPORT_SYMBOL_GPL(mdp_cmdq_send);
--
2.18.0
Adjust label "err_return" order to avoid double freeing, and
add two labels for easy traceability.
Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Moudy Ho <[email protected]>
---
.../media/platform/mediatek/mdp3/mtk-mdp3-core.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index c413e59d4286..2d1f6ae9f080 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -196,27 +196,27 @@ static int mdp_probe(struct platform_device *pdev)
mm_pdev = __get_pdev_by_id(pdev, MDP_INFRA_MMSYS);
if (!mm_pdev) {
ret = -ENODEV;
- goto err_return;
+ goto err_destroy_device;
}
mdp->mdp_mmsys = &mm_pdev->dev;
mm_pdev = __get_pdev_by_id(pdev, MDP_INFRA_MUTEX);
if (WARN_ON(!mm_pdev)) {
ret = -ENODEV;
- goto err_return;
+ goto err_destroy_device;
}
for (i = 0; i < MDP_PIPE_MAX; i++) {
mdp->mdp_mutex[i] = mtk_mutex_get(&mm_pdev->dev);
if (!mdp->mdp_mutex[i]) {
ret = -ENODEV;
- goto err_return;
+ goto err_free_mutex;
}
}
ret = mdp_comp_config(mdp);
if (ret) {
dev_err(dev, "Failed to config mdp components\n");
- goto err_return;
+ goto err_free_mutex;
}
mdp->job_wq = alloc_workqueue(MDP_MODULE_NAME, WQ_FREEZABLE, 0);
@@ -287,11 +287,12 @@ static int mdp_probe(struct platform_device *pdev)
destroy_workqueue(mdp->job_wq);
err_deinit_comp:
mdp_comp_destroy(mdp);
-err_return:
+err_free_mutex:
for (i = 0; i < MDP_PIPE_MAX; i++)
- if (mdp)
- mtk_mutex_put(mdp->mdp_mutex[i]);
+ mtk_mutex_put(mdp->mdp_mutex[i]);
+err_destroy_device:
kfree(mdp);
+err_return:
dev_dbg(dev, "Errno %d\n", ret);
return ret;
}
--
2.18.0
Il 20/10/22 09:18, Moudy Ho ha scritto:
> Adjust label "err_return" order to avoid double freeing, and
> add two labels for easy traceability.
>
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Signed-off-by: Moudy Ho <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>