gitops/mt76
1
0
Fork 0
mirror of https://github.com/outbackdingo/mt76.git synced 2026-10-24 13:26:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

mt76: usb: use full intermediate buffer in mt76u_copy

Browse Source 
Instead of use several 4 bytes usb requests, use full 32 bytes buffer
to copy data to device. With the change we use less requests and copy
exact data size to the device regardless size is multiple of 4 or not.

Signed-off-by: Stanislaw Gruszka <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Stanislaw Gruszka
2019-07-04 20:02:16 +02:00
committed by Felix Fietkau
parent f43b6228fa
commit 5e1e5b75d6
1 changed files with 12 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
usb.c
+12 -7
View File
@@ -160,19 +160,24 @@ static void mt76u_copy(struct mt76_dev *dev, u32 offset,
const void *data, int len)
{
struct mt76_usb *usb = &dev->usb;
const u32 *val = data;
int i, ret;
int ret, req_len;
mutex_lock(&usb->usb_ctrl_mtx);
for (i = 0; i < DIV_ROUND_UP(len, 4); i++) {
put_unaligned(val[i], usb->data);
do {
req_len = min_t(int, len, sizeof(usb->data));
memcpy(usb->data, data, req_len);
ret = __mt76u_vendor_request(dev, MT_VEND_MULTI_WRITE,
USB_DIR_OUT | USB_TYPE_VENDOR,
0, offset + i * 4, usb->data,
sizeof(u32));
0, offset, usb->data, req_len);
if (ret < 0)
break;
}
data += req_len;
offset += req_len;
len -= req_len;
} while (len > 0);
mutex_unlock(&usb->usb_ctrl_mtx);
}