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usb: xhci-mtk: remove unnecessary assignments in periodic TT scheduler

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Remove unnecessary variables in check_sch_bw().
No functional changes, just for better readability.

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210507021127.54717-3-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ikjoon Jang 2021-05-07 10:11:26 +08:00 committed by Greg Kroah-Hartman
parent e56e60f7a9
commit bb8d7ef68e
1 changed files with 14 additions and 23 deletions
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37
drivers/usb/host/xhci-mtk-sch.c
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@ -476,6 +476,9 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
u32 start_cs, last_cs;
int i;
if (!sch_ep->sch_tt)
return 0;
start_ss = offset % 8;
if (sch_ep->ep_type == ISOC_OUT_EP) {
@ -603,54 +606,42 @@ static u32 get_esit_boundary(struct mu3h_sch_ep_info *sch_ep)
static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw,
struct mu3h_sch_ep_info *sch_ep)
{
const u32 esit_boundary = get_esit_boundary(sch_ep);
const u32 bw_boundary = get_bw_boundary(sch_ep->speed);
u32 offset;
u32 min_bw;
u32 min_index;
u32 worst_bw;
u32 bw_boundary;
u32 esit_boundary;
u32 min_num_budget;
u32 min_cs_count;
u32 min_bw = ~0;
int min_index = -1;
int ret = 0;
/*
* Search through all possible schedule microframes.
* and find a microframe where its worst bandwidth is minimum.
*/
min_bw = ~0;
min_index = 0;
min_cs_count = sch_ep->cs_count;
min_num_budget = sch_ep->num_budget_microframes;
esit_boundary = get_esit_boundary(sch_ep);
for (offset = 0; offset < sch_ep->esit; offset++) {
if (sch_ep->sch_tt) {
ret = check_sch_tt(sch_ep, offset);
if (ret)
continue;
}
ret = check_sch_tt(sch_ep, offset);
if (ret)
continue;
if ((offset + sch_ep->num_budget_microframes) > esit_boundary)
break;
worst_bw = get_max_bw(sch_bw, sch_ep, offset);
if (worst_bw > bw_boundary)
continue;
if (min_bw > worst_bw) {
min_bw = worst_bw;
min_index = offset;
min_cs_count = sch_ep->cs_count;
min_num_budget = sch_ep->num_budget_microframes;
}
if (min_bw == 0)
break;
}
bw_boundary = get_bw_boundary(sch_ep->speed);
/* check bandwidth */
if (min_bw > bw_boundary)
if (min_index < 0)
return ret ? ret : -ESCH_BW_OVERFLOW;
sch_ep->offset = min_index;
sch_ep->cs_count = min_cs_count;
sch_ep->num_budget_microframes = min_num_budget;
return load_ep_bw(sch_bw, sch_ep, true);
}