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Subject[PATCH v2 1/2] media: sunxi: Fix some error handling path of sun8i_a83t_mipi_csi2_probe()
Date
Release some resources in the error handling path of the probe and of
sun8i_a83t_mipi_csi2_resources_setup(), as already done in the remove
function.

Fixes: 576d196c522b ("media: sunxi: Add support for the A83T MIPI CSI-2 controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
I'm unsure about the phy_exit() call in
sun8i_a83t_mipi_csi2_resources_cleanup() because no explicit phy_init()
call is performed.

The same code is in sun6i-mipi-csi2/sun6i_mipi_csi2.c, but in this driver
phy_init() IS called.

I leave it as-is because I don't if it is an issue or not.
My feeling is that it is a copy'n'paste error and that it should be
removed.

Changes in v2:
* add some blank line [Paul Kocialkowski <paul.kocialkowski@bootlin.com>]
* rename the new labels [Paul Kocialkowski <paul.kocialkowski@bootlin.com>]

v1:
https://lore.kernel.org/all/62c0aef8d3b86d8f290bf6787f1b2b41efbb0b55.1659295329.git.christophe.jaillet@wanadoo.fr/
---
.../sun8i_a83t_mipi_csi2.c | 23 +++++++++++++++----
1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
index d052ee77ef0a..b032ec13a683 100644
--- a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
+++ b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
@@ -719,13 +719,15 @@ sun8i_a83t_mipi_csi2_resources_setup(struct sun8i_a83t_mipi_csi2_device *csi2_de
csi2_dev->clock_mipi = devm_clk_get(dev, "mipi");
if (IS_ERR(csi2_dev->clock_mipi)) {
dev_err(dev, "failed to acquire mipi clock\n");
- return PTR_ERR(csi2_dev->clock_mipi);
+ ret = PTR_ERR(csi2_dev->clock_mipi);
+ goto error_clock_rate_exclusive;
}

csi2_dev->clock_misc = devm_clk_get(dev, "misc");
if (IS_ERR(csi2_dev->clock_misc)) {
dev_err(dev, "failed to acquire misc clock\n");
- return PTR_ERR(csi2_dev->clock_misc);
+ ret = PTR_ERR(csi2_dev->clock_misc);
+ goto error_clock_rate_exclusive;
}

/* Reset */
@@ -733,7 +735,8 @@ sun8i_a83t_mipi_csi2_resources_setup(struct sun8i_a83t_mipi_csi2_device *csi2_de
csi2_dev->reset = devm_reset_control_get_shared(dev, NULL);
if (IS_ERR(csi2_dev->reset)) {
dev_err(dev, "failed to get reset controller\n");
- return PTR_ERR(csi2_dev->reset);
+ ret = PTR_ERR(csi2_dev->reset);
+ goto error_clock_rate_exclusive;
}

/* D-PHY */
@@ -741,7 +744,7 @@ sun8i_a83t_mipi_csi2_resources_setup(struct sun8i_a83t_mipi_csi2_device *csi2_de
ret = sun8i_a83t_dphy_register(csi2_dev);
if (ret) {
dev_err(dev, "failed to initialize MIPI D-PHY\n");
- return ret;
+ goto error_clock_rate_exclusive;
}

/* Runtime PM */
@@ -749,6 +752,11 @@ sun8i_a83t_mipi_csi2_resources_setup(struct sun8i_a83t_mipi_csi2_device *csi2_de
pm_runtime_enable(dev);

return 0;
+
+error_clock_rate_exclusive:
+ clk_rate_exclusive_put(csi2_dev->clock_mod);
+
+ return ret;
}

static void
@@ -778,9 +786,14 @@ static int sun8i_a83t_mipi_csi2_probe(struct platform_device *platform_dev)

ret = sun8i_a83t_mipi_csi2_bridge_setup(csi2_dev);
if (ret)
- return ret;
+ goto error_resources;

return 0;
+
+error_resources:
+ sun8i_a83t_mipi_csi2_resources_cleanup(csi2_dev);
+
+ return ret;
}

static int sun8i_a83t_mipi_csi2_remove(struct platform_device *platform_dev)
--
2.34.1
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