usb: dwc3: debugfs: Re-use DEFINE_SHOW_ATTRIBUTE() macro
From: Felipe Balbi <hidden>
Date: 2018-02-15 11:16:38
Subsystem:
designware usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
...instead of open coding file operations followed by custom ->open() callbacks per each attribute. Signed-off-by: Felipe Balbi <redacted> --- drivers/usb/dwc3/debugfs.c | 79 ++++++++++++++++++++-------------------------- 1 file changed, 34 insertions(+), 45 deletions(-)
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 00e65530c81e..160dc90a4a41 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c@@ -487,8 +487,8 @@ static const struct file_operations dwc3_link_state_fops = { }; struct dwc3_ep_file_map { - char name[25]; - int (*show)(struct seq_file *s, void *unused); + const char name[25]; + const struct file_operations *const fops; }; static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
@@ -596,7 +596,7 @@ static int dwc3_event_queue_show(struct seq_file *s, void *unused) return 0; } -static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused) +static int dwc3_transfer_type_show(struct seq_file *s, void *unused) { struct dwc3_ep *dep = s->private; struct dwc3 *dwc = dep->dwc;
@@ -632,7 +632,7 @@ static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused) return 0; } -static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused) +static int dwc3_trb_ring_show(struct seq_file *s, void *unused) { struct dwc3_ep *dep = s->private; struct dwc3 *dwc = dep->dwc;
@@ -670,49 +670,33 @@ static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused) return 0; } -static struct dwc3_ep_file_map map[] = { - { "tx_fifo_queue", dwc3_tx_fifo_queue_show, }, - { "rx_fifo_queue", dwc3_rx_fifo_queue_show, }, - { "tx_request_queue", dwc3_tx_request_queue_show, }, - { "rx_request_queue", dwc3_rx_request_queue_show, }, - { "rx_info_queue", dwc3_rx_info_queue_show, }, - { "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, }, - { "event_queue", dwc3_event_queue_show, }, - { "transfer_type", dwc3_ep_transfer_type_show, }, - { "trb_ring", dwc3_ep_trb_ring_show, }, -}; - -static int dwc3_endpoint_open(struct inode *inode, struct file *file) -{ - const char *file_name = file_dentry(file)->d_iname; - struct dwc3_ep_file_map *f_map; - int i; - - for (i = 0; i < ARRAY_SIZE(map); i++) { - f_map = &map[i]; - - if (strcmp(f_map->name, file_name) == 0) - break; - } - - return single_open(file, f_map->show, inode->i_private); -} - -static const struct file_operations dwc3_endpoint_fops = { - .open = dwc3_endpoint_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, +DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type); +DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring); + +static const struct dwc3_ep_file_map dwc3_ep_file_map[] = { + { "tx_fifo_queue", &dwc3_tx_fifo_queue_fops, }, + { "rx_fifo_queue", &dwc3_rx_fifo_queue_fops, }, + { "tx_request_queue", &dwc3_tx_request_queue_fops, }, + { "rx_request_queue", &dwc3_rx_request_queue_fops, }, + { "rx_info_queue", &dwc3_rx_info_queue_fops, }, + { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, }, + { "event_queue", &dwc3_event_queue_fops, }, + { "transfer_type", &dwc3_transfer_type_fops, }, + { "trb_ring", &dwc3_trb_ring_fops, }, }; static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep, - struct dentry *parent, int type) + struct dentry *parent, const char *const name, + const struct file_operations *const fops) { - struct dentry *file; - struct dwc3_ep_file_map *ep_file = &map[type]; - - file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep, - &dwc3_endpoint_fops); + (void) debugfs_create_file(name, S_IRUGO, parent, dep, fops); } static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
@@ -720,8 +704,13 @@ static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep, { int i; - for (i = 0; i < ARRAY_SIZE(map); i++) - dwc3_debugfs_create_endpoint_file(dep, parent, i); + for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) { + const struct file_operations *fops = dwc3_ep_file_map[i].fops; + const char *name = dwc3_ep_file_map[i].name; + + dwc3_debugfs_create_endpoint_file(dep, parent, + name, fops); + } } static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,