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Subject: media: staging: media: imx: no need to check return value of 
debugfs_create functions
Author:  Greg Kroah-Hartman <[email protected]>
Date:    Tue Apr 28 19:04:05 2020 +0200

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Steve Longerbeam <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Shawn Guo <[email protected]>
Cc: Sascha Hauer <[email protected]>
Cc: Pengutronix Kernel Team <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: NXP Linux Team <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Rui Miguel Silva <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/staging/media/imx/imx7-mipi-csis.c | 29 +++++------------------------
 1 file changed, 5 insertions(+), 24 deletions(-)

---

diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c 
b/drivers/staging/media/imx/imx7-mipi-csis.c
index e2403b448b6d..ca20f5da9ac6 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -1017,33 +1017,14 @@ static int mipi_csis_dump_regs_show(struct seq_file *m, 
void *private)
 }
 DEFINE_SHOW_ATTRIBUTE(mipi_csis_dump_regs);
 
-static int mipi_csis_debugfs_init(struct csi_state *state)
+static void mipi_csis_debugfs_init(struct csi_state *state)
 {
-       struct dentry *d;
-
-       if (!debugfs_initialized())
-               return -ENODEV;
-
        state->debugfs_root = debugfs_create_dir(dev_name(state->dev), NULL);
-       if (!state->debugfs_root)
-               return -ENOMEM;
-
-       d = debugfs_create_bool("debug_enable", 0600, state->debugfs_root,
-                               &state->debug);
-       if (!d)
-               goto remove_debugfs;
-
-       d = debugfs_create_file("dump_regs", 0600, state->debugfs_root,
-                               state, &mipi_csis_dump_regs_fops);
-       if (!d)
-               goto remove_debugfs;
-
-       return 0;
-
-remove_debugfs:
-       debugfs_remove_recursive(state->debugfs_root);
 
-       return -ENOMEM;
+       debugfs_create_bool("debug_enable", 0600, state->debugfs_root,
+                           &state->debug);
+       debugfs_create_file("dump_regs", 0600, state->debugfs_root, state,
+                           &mipi_csis_dump_regs_fops);
 }
 
 static void mipi_csis_debugfs_exit(struct csi_state *state)
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