From 428c8047526a047e885bb0643a19369ff1941728 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Tue, 14 Oct 2025 01:55:42 +0300 Subject: [PATCH] xhci: dbc: enable back DbC in resume if it was enabled before suspend MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 2bbd38fcd29670e46c0fdb9cd0e90507a8a1bf6a upstream. DbC is currently only enabled back if it's in configured state during suspend. If system is suspended after DbC is enabled, but before the device is properly enumerated by the host, then DbC would not be enabled back in resume. Always enable DbC back in resume if it's suspended in enabled, connected, or configured state Cc: stable Fixes: dfba2174dc42 ("usb: xhci: Add DbC support in xHCI driver") Tested-by: Łukasz Bartosik Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-dbgcap.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c index 93e2cca5262d..4e65ebbaa09b 100644 --- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -975,8 +975,15 @@ int xhci_dbc_suspend(struct xhci_hcd *xhci) if (!dbc) return 0; - if (dbc->state == DS_CONFIGURED) + switch (dbc->state) { + case DS_ENABLED: + case DS_CONNECTED: + case DS_CONFIGURED: dbc->resume_required = 1; + break; + default: + break; + } xhci_dbc_stop(xhci);