From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
<linux-usb@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, "Ikjoon Jang" <ikjn@chromium.org>,
Eddie Hung <eddie.hung@mediatek.com>
Subject: [PATCH v2 2/3] usb: xhci-mtk: remove unnecessary assignments in periodic TT scheduler
Date: Thu, 6 May 2021 14:31:15 +0800 [thread overview]
Message-ID: <20210506063116.41757-2-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <20210506063116.41757-1-chunfeng.yun@mediatek.com>
From: Ikjoon Jang <ikjn@chromium.org>
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>
---
v2: no changes
---
drivers/usb/host/xhci-mtk-sch.c | 37 +++++++++++++--------------------
1 file changed, 14 insertions(+), 23 deletions(-)
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 8b90da5a6ed1..9fb75085e40f 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c
@@ -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);
}
--
2.18.0
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next prev parent reply other threads:[~2021-05-06 6:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 6:31 [PATCH v2 1/3] usb: xhci-mtk: use bitfield instead of bool Chunfeng Yun
2021-05-06 6:31 ` Chunfeng Yun [this message]
2021-05-06 6:31 ` [PATCH v2 3/3] usb: xhci-mtk: use first-fit for LS/FS Chunfeng Yun
2021-05-06 7:37 ` [PATCH v2 1/3] usb: xhci-mtk: use bitfield instead of bool Greg Kroah-Hartman
2021-05-07 1:27 ` Chunfeng Yun
2021-05-06 8:50 ` Sergei Shtylyov
2021-05-07 1:28 ` Chunfeng Yun
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