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usbmon: Use list_for_each_entry() helper 

Convert list_for_each() to list_for_each_entry() so that the p/pos
list_head pointer and list_entry() call are no longer needed, which
can reduce a few lines of code. No functional changed.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20230830085658.527752-1-ruanjinjie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jinjie Ruan 2023-08-30 16:56:58 +08:00 committed by Greg Kroah-Hartman
parent eb9c996f01
commit 80920e2126
1 changed files with 5 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/usb/mon/mon_main.c
View File

@ -81,15 +81,12 @@ void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r)
static void mon_bus_submit(struct mon_bus *mbus, struct urb *urb)
{
unsigned long flags;
struct list_head *pos;
struct mon_reader *r;
spin_lock_irqsave(&mbus->lock, flags);
mbus->cnt_events++;
list_for_each (pos, &mbus->r_list) {
r = list_entry(pos, struct mon_reader, r_link);
list_for_each_entry(r, &mbus->r_list, r_link)
r->rnf_submit(r->r_data, urb);
}
spin_unlock_irqrestore(&mbus->lock, flags);
}
@ -108,15 +105,12 @@ static void mon_submit(struct usb_bus *ubus, struct urb *urb)
static void mon_bus_submit_error(struct mon_bus *mbus, struct urb *urb, int error)
{
unsigned long flags;
struct list_head *pos;
struct mon_reader *r;
spin_lock_irqsave(&mbus->lock, flags);
mbus->cnt_events++;
list_for_each (pos, &mbus->r_list) {
r = list_entry(pos, struct mon_reader, r_link);
list_for_each_entry(r, &mbus->r_list, r_link)
r->rnf_error(r->r_data, urb, error);
}
spin_unlock_irqrestore(&mbus->lock, flags);
}
@ -135,15 +129,12 @@ static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error)
static void mon_bus_complete(struct mon_bus *mbus, struct urb *urb, int status)
{
unsigned long flags;
struct list_head *pos;
struct mon_reader *r;
spin_lock_irqsave(&mbus->lock, flags);
mbus->cnt_events++;
list_for_each (pos, &mbus->r_list) {
r = list_entry(pos, struct mon_reader, r_link);
list_for_each_entry(r, &mbus->r_list, r_link)
r->rnf_complete(r->r_data, urb, status);
}
spin_unlock_irqrestore(&mbus->lock, flags);
}
@ -165,11 +156,9 @@ static void mon_complete(struct usb_bus *ubus, struct urb *urb, int status)
static void mon_stop(struct mon_bus *mbus)
{
struct usb_bus *ubus;
struct list_head *p;
if (mbus == &mon_bus0) {
list_for_each (p, &mon_buses) {
mbus = list_entry(p, struct mon_bus, bus_link);
list_for_each_entry(mbus, &mon_buses, bus_link) {
/*
* We do not change nreaders here, so rely on mon_lock.
*/
@ -332,14 +321,12 @@ static void mon_bus0_init(void)
*/
struct mon_bus *mon_bus_lookup(unsigned int num)
{
struct list_head *p;
struct mon_bus *mbus;
if (num == 0) {
return &mon_bus0;
}
list_for_each (p, &mon_buses) {
mbus = list_entry(p, struct mon_bus, bus_link);
list_for_each_entry(mbus, &mon_buses, bus_link) {
if (mbus->u_bus->busnum == num) {
return mbus;
}