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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-03-31 16:25:41 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-02 15:56:33 +0200 |
| commit | d8fca036ef6d5c7e93157edeab614c8cd2758e90 (patch) | |
| tree | fa4f096e18395988a71e1e8e58f04f06fb17f5f9 /drivers/usb/host | |
| parent | 2e3d055bf27d70204cae349335a62a4f9b7c165a (diff) | |
| download | linux-d8fca036ef6d5c7e93157edeab614c8cd2758e90.tar.gz linux-d8fca036ef6d5c7e93157edeab614c8cd2758e90.tar.bz2 linux-d8fca036ef6d5c7e93157edeab614c8cd2758e90.zip | |
usb: xhci-mtk: fix wrong remainder of bandwidth budget
The remainder of the last bandwidth bugdget is wrong,
it's the value alloacted in last bugdget, not unused.
Reported-by: Yaqii Wu <Yaqii.Wu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1617179142-2681-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-mtk-sch.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index a59d1f6d4744..7ac76ae28998 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -341,7 +341,6 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, } if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) { - u32 remainder; if (sch_ep->esit == 1) sch_ep->pkts = esit_pkts; @@ -357,14 +356,12 @@ static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1); sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts; - remainder = sch_ep->bw_cost_per_microframe; - remainder *= sch_ep->num_budget_microframes; - remainder -= (maxpkt * esit_pkts); for (i = 0; i < sch_ep->num_budget_microframes - 1; i++) bwb_table[i] = sch_ep->bw_cost_per_microframe; /* last one <= bw_cost_per_microframe */ - bwb_table[i] = remainder; + bwb_table[i] = maxpkt * esit_pkts + - i * sch_ep->bw_cost_per_microframe; } } else if (is_fs_or_ls(sch_ep->speed)) { sch_ep->pkts = 1; /* at most one packet for each microframe */ |