linux-kernel - [PATCH RESEND v8] usb: xhci: plat: Enable async suspend/resume

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 20 Feb 2017 10:48:26 -0500
From:   Robert Foss <robert.foss@...labora.com>
To:     mathias.nyman@...el.com, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Julius Werner <jwerner@...omium.org>,
        Andrew Bresticker <abrestic@...omium.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Brian Norris <briannorris@...omium.org>,
        Baolin Wang <baolin.wang@...aro.org>
Cc:     Robert Foss <robert.foss@...labora.com>
Subject: [PATCH RESEND v8] usb: xhci: plat: Enable async suspend/resume

From: Andrew Bresticker <abrestic@...omium.org>

USB host controllers can take a significant amount of time to suspend
and resume, adding several hundred miliseconds to the kernel resume
time. Since the XHCI controller has no outside dependencies (other than
clocks, which are suspended late/resumed early), allow it to suspend and
resume asynchronously.

Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
Tested-by: Andrew Bresticker <abrestic@...omium.org>
Tested-by: Robert Foss <robert.foss@...labora.com>
Signed-off-by: Robert Foss <robert.foss@...labora.com>
Reviewed-by: Baolin Wang <baolin.wang@...aro.org>
---

Changes since v8:
 - Rebased on upstream/master
 - Added r-b of Baolin Wang


 drivers/usb/host/xhci-plat.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index e5834dd9bcde..8ef34fe4d5c0 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -255,6 +255,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto dealloc_usb2_hcd;
 
+	device_enable_async_suspend(&pdev->dev);
+
 	return 0;
 
 
-- 
2.11.0.453.g787f75f05