From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: [PATCHv2] phy: cpcap-usb: Fix flakey host idling and enumerating of devices Date: Sun, 22 Dec 2019 10:00:19 -0800 Message-ID: <20191222180019.55417-1-tony@atomide.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Kishon Vijay Abraham I Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org, Jacopo Mondi , Marcel Partap , Merlijn Wajer , Michael Scott , NeKit , Pavel Machek , Sebastian Reichel List-Id: linux-omap@vger.kernel.org We must let the USB host idle things properly before we switch to debug UART mode. Otherwise the USB host may never idle after disconnecting devices, and that causes the next enumeration to be flakey. Cc: Jacopo Mondi Cc: Marcel Partap Cc: Merlijn Wajer Cc: Michael Scott Cc: NeKit Cc: Pavel Machek Cc: Sebastian Reichel Fixes: 6d6ce40f63af ("phy: cpcap-usb: Add CPCAP PMIC USB support") Signed-off-by: Tony Lindgren --- Kishon, looks like the v1 patch sent in August got lost somewhere. Here's a resend update against your fixes branch. drivers/phy/motorola/phy-cpcap-usb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/phy/motorola/phy-cpcap-usb.c b/drivers/phy/motorola/phy-cpcap-usb.c --- a/drivers/phy/motorola/phy-cpcap-usb.c +++ b/drivers/phy/motorola/phy-cpcap-usb.c @@ -283,13 +283,13 @@ static void cpcap_usb_detect(struct work_struct *work) return; } + cpcap_usb_try_musb_mailbox(ddata, MUSB_VBUS_OFF); + /* Default to debug UART mode */ error = cpcap_usb_set_uart_mode(ddata); if (error) goto out_err; - cpcap_usb_try_musb_mailbox(ddata, MUSB_VBUS_OFF); - dev_dbg(ddata->dev, "set UART mode\n"); return; -- 2.24.1