linux-kernel - [PATCH 1/2] usb: chipidea: msm: Use posted data writes on AHB

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 linux-cve-announce PHC
Open Source and information security mailing list archives

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

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

Message-Id: <1446789847-640-2-git-send-email-agross@codeaurora.org>
Date:	Fri,  6 Nov 2015 00:04:06 -0600
From:	Andy Gross <agross@...eaurora.org>
To:	linux-usb@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Peter Chen <Peter.Chen@...escale.com>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Andy Gross <agross@...eaurora.org>
Subject: [PATCH 1/2] usb: chipidea: msm: Use posted data writes on AHB

This patch sets the AHBMODE to allow for posted data writes.  This
results in higher performance.

Signed-off-by: Andy Gross <agross@...eaurora.org>
---
 drivers/usb/chipidea/ci_hdrc_msm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index d79ecc0..3889809 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -25,7 +25,8 @@ static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
 	case CI_HDRC_CONTROLLER_RESET_EVENT:
 		dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
 		writel(0, USB_AHBBURST);
-		writel(0, USB_AHBMODE);
+		/* use AHB transactor, allow posted data writes */
+		writel(0x8, USB_AHBMODE);
 		usb_phy_init(ci->usb_phy);
 		break;
 	case CI_HDRC_CONTROLLER_STOPPED_EVENT:
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/