[PATCH v5 06/20] staging: media: tegra-video: improve error messages

Luca Ceresoli
2023-04-07T13:39:48Z

tegra_vi_channels_alloc() can primarily fail for two reasons:

1. "ports" node not found
2. port_num > vi->soc->vi_max_channels

Case 1 prints nothing, case 2 has a dev_err(). The caller [tegra_vi_init()]
has a generic dev_err() on any failure. This mean that in case 2 we print
two messages, and in case 1 we only print a generic message.

Remove the generic message and add a specific message when case 1 happens,
so that we always have one specific message without even increasing the
number of dev_dbg*() calls.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>

---

No changes in v5

Changed in v4:
- Added review tags

No changes in v3
No changes in v2
---
drivers/staging/media/tegra-video/vi.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 79dd02a1e29b..1c0424bf1ab0 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -1361,7 +1361,7 @@ static int tegra_vi_channels_alloc(struct tegra_vi *vi)

ports = of_get_child_by_name(node, "ports");
if (!ports)
- return -ENODEV;
+ return dev_err_probe(vi->dev, -ENODEV, "%pOF: missing 'ports' node\n", node);

for_each_child_of_node(ports, port) {
if (!of_node_name_eq(port, "port"))
@@ -1921,11 +1921,8 @@ static int tegra_vi_init(struct host1x_client *client)
ret = tegra_vi_tpg_channels_alloc(vi);
else
ret = tegra_vi_channels_alloc(vi);
- if (ret < 0) {
- dev_err(vi->dev,
- "failed to allocate vi channels: %d\n", ret);
+ if (ret < 0)
goto free_chans;
- }

ret = tegra_vi_channels_init(vi);
if (ret < 0)
--
2.34.1