diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2021-09-01 19:36:06 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2021-09-01 21:52:32 +0300 |
| commit | d2f311ec91984adb219ac6985d4dd72c37ae734d (patch) | |
| tree | 7164eabfbb51ff5d7a8876c2b1ff481af854de19 /drivers/hid/usbhid | |
| parent | 0a824efdb724e07574bafcd2c2486b2a3de35ff6 (diff) | |
| download | linux-d2f311ec91984adb219ac6985d4dd72c37ae734d.tar.xz | |
HID: usbhid: Simplify code in hid_submit_ctrl()
This patch makes a small simplification to the code in
hid_submit_ctrl(). The test for maxpacket being > 0 is unnecessary,
because endpoint 0 always has a maxpacket value which is >= 8.
Furthermore, endpoint 0's maxpacket value is always a power of 2, so
instead of open-coding the round-to-next-multiple computation we can
call the optimized round_up() routine.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/usbhid')
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index c56cb03c1551..2dcaf31eb9cd 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -388,14 +388,10 @@ static int hid_submit_ctrl(struct hid_device *hid) usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0); - if (maxpacket > 0) { - len += (len == 0); /* Don't allow 0-length reports */ - len = DIV_ROUND_UP(len, maxpacket); - len *= maxpacket; - if (len > usbhid->bufsize) - len = usbhid->bufsize; - } else - len = 0; + len += (len == 0); /* Don't allow 0-length reports */ + len = round_up(len, maxpacket); + if (len > usbhid->bufsize) + len = usbhid->bufsize; } usbhid->urbctrl->transfer_buffer_length = len; usbhid->urbctrl->dev = hid_to_usb_dev(hid); |