Re: [PATCH v5] usb: xhci-mtk: fix unreleased bandwidth data
From: Mathias Nyman <hidden>
Date: 2021-01-07 11:09:47
Also in:
linux-mediatek, linux-usb, lkml
On 29.12.2020 8.24, Ikjoon Jang wrote:
xhci-mtk has hooks on add_endpoint() and drop_endpoint() from xhci
to handle its own sw bandwidth managements and stores bandwidth data
into internal table every time add_endpoint() is called,
so when bandwidth allocation fails at one endpoint, all earlier
allocation from the same interface could still remain at the table.
This patch adds two more hooks from check_bandwidth() and
reset_bandwidth(), and make mtk-xhci to releases all failed endpoints
from reset_bandwidth().
Fixes: 08e469de87a2 ("usb: xhci-mtk: supports bandwidth scheduling with multi-TT")
Signed-off-by: Ikjoon Jang <redacted>...
quoted hunk ↗ jump to hunk
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index d4a8d0efbbc4..e1fcd3cf723f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c@@ -2882,6 +2882,12 @@ static int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); virt_dev = xhci->devs[udev->slot_id]; + if (xhci->quirks & XHCI_MTK_HOST) { + ret = xhci_mtk_check_bandwidth(hcd, udev); + if (ret < 0) + return ret; + } +
Just noticed that XHCI_MTK_HOST quirk is only set in xhci-mtk.c. xhci-mtk.c calls xhci_init_driver(..., xhci_mtk_overrides) with a .reset override function. why not add override functions for .check_bandwidth and .reset_bandwidth to xhci_mtk_overrides instead? Another patch to add similar overrides for .add_endpoint and .drop_endpoint should probably be done so that we can get rid of the xhci_mtk_add/drop_ep_quirk() calls in xhci.c as well Thanks -Mathias _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel