mailbox: no need to check return value of debugfs_create functions

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: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c
index a64116586b4cccbfbe6b8e26c38209eb7ac5cd10..43b336316fded7dc80ad92812bf9dc96d6accf0e 100644 (file)
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -296,8 +296,6 @@ struct flexrm_mbox {
        struct dma_pool *bd_pool;
        struct dma_pool *cmpl_pool;
        struct dentry *root;
-       struct dentry *config;
-       struct dentry *stats;
        struct mbox_controller controller;
 };
 
@@ -1603,7 +1601,6 @@ static int flexrm_mbox_probe(struct platform_device *pdev)
                                          1 << RING_CMPL_ALIGN_ORDER, 0);
        if (!mbox->cmpl_pool) {
                ret = -ENOMEM;
-               goto fail_destroy_bd_pool;
        }
 
        /* Allocate platform MSIs for each ring */
@@ -1624,28 +1621,15 @@ static int flexrm_mbox_probe(struct platform_device *pdev)
 
        /* Create debugfs root entry */
        mbox->root = debugfs_create_dir(dev_name(mbox->dev), NULL);
-       if (IS_ERR_OR_NULL(mbox->root)) {
-               ret = PTR_ERR_OR_ZERO(mbox->root);
-               goto fail_free_msis;
-       }
 
        /* Create debugfs config entry */
-       mbox->config = debugfs_create_devm_seqfile(mbox->dev,
-                                                  "config", mbox->root,
-                                                  flexrm_debugfs_conf_show);
-       if (IS_ERR_OR_NULL(mbox->config)) {
-               ret = PTR_ERR_OR_ZERO(mbox->config);
-               goto fail_free_debugfs_root;
-       }
+       debugfs_create_devm_seqfile(mbox->dev, "config", mbox->root,
+                                   flexrm_debugfs_conf_show);
 
        /* Create debugfs stats entry */
-       mbox->stats = debugfs_create_devm_seqfile(mbox->dev,
-                                                 "stats", mbox->root,
-                                                 flexrm_debugfs_stats_show);
-       if (IS_ERR_OR_NULL(mbox->stats)) {
-               ret = PTR_ERR_OR_ZERO(mbox->stats);
-               goto fail_free_debugfs_root;
-       }
+       debugfs_create_devm_seqfile(mbox->dev, "stats", mbox->root,
+                                   flexrm_debugfs_stats_show);
+
 skip_debugfs:
 
        /* Initialize mailbox controller */
@@ -1676,11 +1660,9 @@ static int flexrm_mbox_probe(struct platform_device *pdev)
 
 fail_free_debugfs_root:
        debugfs_remove_recursive(mbox->root);
-fail_free_msis:
        platform_msi_domain_free_irqs(dev);
 fail_destroy_cmpl_pool:
        dma_pool_destroy(mbox->cmpl_pool);
-fail_destroy_bd_pool:
        dma_pool_destroy(mbox->bd_pool);
 fail:
        return ret;

diff --git a/drivers/mailbox/bcm-pdc-mailbox.c b/drivers/mailbox/bcm-pdc-mailbox.c
index ccf3d62af7e7b05a8d53ac8914cd9cbda4512bc0..a8c2913861427bde2301fdf428a5eee579d283b1 100644 (file)
--- a/drivers/mailbox/bcm-pdc-mailbox.c
+++ b/drivers/mailbox/bcm-pdc-mailbox.c
@@ -406,8 +406,6 @@ struct pdc_state {
         */
        struct scatterlist *src_sg[PDC_RING_ENTRIES];
 
-       struct dentry *debugfs_stats;  /* debug FS stats file for this PDC */
-
        /* counters */
        u32  pdc_requests;     /* number of request messages submitted */
        u32  pdc_replies;      /* number of reply messages received */
@@ -512,9 +510,8 @@ static void pdc_setup_debugfs(struct pdc_state *pdcs)
                debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 
        /* S_IRUSR == 0400 */
-       pdcs->debugfs_stats = debugfs_create_file(spu_stats_name, 0400,
-                                                 debugfs_dir, pdcs,
-                                                 &pdc_debugfs_stats);
+       debugfs_create_file(spu_stats_name, 0400, debugfs_dir, pdcs,
+                           &pdc_debugfs_stats);
 }
 
 static void pdc_free_debugfs(void)
@@ -1614,7 +1611,6 @@ static int pdc_probe(struct platform_device *pdev)
        if (err)
                goto cleanup_buf_pool;
 
-       pdcs->debugfs_stats = NULL;
        pdc_setup_debugfs(pdcs);
 
        dev_dbg(dev, "pdc_probe() successful");