[PATCH 02/11] hfi1: get rid of redundant debugfs_file_{get,put}()

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

All files in question are created via debugfs_create_file(), so
exclusion with removals is provided by debugfs wrappers; as the matter
of fact, hfi1-private wrappers had been redundant at least since 2017...

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
 drivers/infiniband/hw/hfi1/debugfs.c | 28 ----------------------------
 drivers/infiniband/hw/hfi1/debugfs.h |  9 ++-------
 drivers/infiniband/hw/hfi1/fault.c   |  9 ---------
 3 files changed, 2 insertions(+), 44 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c
index a1e01b447265..ac37ab7f8995 100644
--- a/drivers/infiniband/hw/hfi1/debugfs.c
+++ b/drivers/infiniband/hw/hfi1/debugfs.c
@@ -22,34 +22,6 @@
 
 static struct dentry *hfi1_dbg_root;
 
-/* wrappers to enforce srcu in seq file */
-ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
-		      loff_t *ppos)
-{
-	struct dentry *d = file->f_path.dentry;
-	ssize_t r;
-
-	r = debugfs_file_get(d);
-	if (unlikely(r))
-		return r;
-	r = seq_read(file, buf, size, ppos);
-	debugfs_file_put(d);
-	return r;
-}
-
-loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence)
-{
-	struct dentry *d = file->f_path.dentry;
-	loff_t r;
-
-	r = debugfs_file_get(d);
-	if (unlikely(r))
-		return r;
-	r = seq_lseek(file, offset, whence);
-	debugfs_file_put(d);
-	return r;
-}
-
 #define private2dd(file) (file_inode(file)->i_private)
 #define private2ppd(file) (file_inode(file)->i_private)
 
diff --git a/drivers/infiniband/hw/hfi1/debugfs.h b/drivers/infiniband/hw/hfi1/debugfs.h
index 54d952a4016c..65b48839abc6 100644
--- a/drivers/infiniband/hw/hfi1/debugfs.h
+++ b/drivers/infiniband/hw/hfi1/debugfs.h
@@ -33,16 +33,11 @@ static int _##name##_open(struct inode *inode, struct file *s) \
 static const struct file_operations _##name##_file_ops = { \
 	.owner   = THIS_MODULE, \
 	.open    = _##name##_open, \
-	.read    = hfi1_seq_read, \
-	.llseek  = hfi1_seq_lseek, \
+	.read    = seq_read, \
+	.llseek  = seq_lseek, \
 	.release = seq_release \
 }
 
-
-ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
-		      loff_t *ppos);
-loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence);
-
 #ifdef CONFIG_DEBUG_FS
 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd);
 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd);
diff --git a/drivers/infiniband/hw/hfi1/fault.c b/drivers/infiniband/hw/hfi1/fault.c
index ec9ee59fcf0c..a45cbffd52c7 100644
--- a/drivers/infiniband/hw/hfi1/fault.c
+++ b/drivers/infiniband/hw/hfi1/fault.c
@@ -104,9 +104,6 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf,
 		goto free_data;
 	}
 
-	ret = debugfs_file_get(file->f_path.dentry);
-	if (unlikely(ret))
-		goto free_data;
 	ptr = data;
 	token = ptr;
 	for (ptr = data; *ptr; ptr = end + 1, token = ptr) {
@@ -154,7 +151,6 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf,
 	}
 	ret = len;
 
-	debugfs_file_put(file->f_path.dentry);
 free_data:
 	kfree(data);
 	return ret;
@@ -173,9 +169,6 @@ static ssize_t fault_opcodes_read(struct file *file, char __user *buf,
 	data = kcalloc(datalen, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
-	ret = debugfs_file_get(file->f_path.dentry);
-	if (unlikely(ret))
-		goto free_data;
 	bit = find_first_bit(fault->opcodes, bitsize);
 	while (bit < bitsize) {
 		zero = find_next_zero_bit(fault->opcodes, bitsize, bit);
@@ -189,11 +182,9 @@ static ssize_t fault_opcodes_read(struct file *file, char __user *buf,
 					 bit);
 		bit = find_next_bit(fault->opcodes, bitsize, zero);
 	}
-	debugfs_file_put(file->f_path.dentry);
 	data[size - 1] = '\n';
 	data[size] = '\0';
 	ret = simple_read_from_buffer(buf, len, pos, data, size);
-free_data:
 	kfree(data);
 	return ret;
 }
-- 
2.39.5