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mtip32xx: Remove redundant null pointer checks in mtip_hw_debugfs_init()

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Since the debugfs_create_dir() never returns a null pointer, checking
the return value for a null pointer is redundant. Since
debugfs_create_file() can deal with a ERR_PTR() style pointer, drop
the check.  Since mtip_hw_debugfs_init does not pay attention to the
return value, its return type can be changed to void.

Signed-off-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/20240907034046.3595268-1-lizetao1@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Li Zetao 2024-09-07 11:40:46 +08:00 committed by Jens Axboe
parent 68f31e8891
commit a02e98bebc
1 changed files with 1 additions and 18 deletions
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19
drivers/block/mtip32xx/mtip32xx.c
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@ -2269,25 +2269,12 @@ static const struct file_operations mtip_flags_fops = {
.llseek = no_llseek,
};
static int mtip_hw_debugfs_init(struct driver_data *dd)
static void mtip_hw_debugfs_init(struct driver_data *dd)
{
if (!dfs_parent)
return -1;
dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
if (IS_ERR_OR_NULL(dd->dfs_node)) {
dev_warn(&dd->pdev->dev,
"Error creating node %s under debugfs\n",
dd->disk->disk_name);
dd->dfs_node = NULL;
return -1;
}
debugfs_create_file("flags", 0444, dd->dfs_node, dd, &mtip_flags_fops);
debugfs_create_file("registers", 0444, dd->dfs_node, dd,
&mtip_regs_fops);
return 0;
}
static void mtip_hw_debugfs_exit(struct driver_data *dd)
@ -4043,10 +4030,6 @@ static int __init mtip_init(void)
mtip_major = error;
dfs_parent = debugfs_create_dir("rssd", NULL);
if (IS_ERR_OR_NULL(dfs_parent)) {
pr_warn("Error creating debugfs parent\n");
dfs_parent = NULL;
}
/* Register our PCI operations. */
error = pci_register_driver(&mtip_pci_driver);