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From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: balbi@kernel.org
Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org, stable@vger.kernel.org,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [PATCH v2 6/6] usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting
Date: Tue, 10 Apr 2018 14:38:54 +0900	[thread overview]
Message-ID: <1523338734-20474-7-git-send-email-yoshihiro.shimoda.uh@renesas.com> (raw)
In-Reply-To: <1523338734-20474-1-git-send-email-yoshihiro.shimoda.uh@renesas.com>

This patch fixes an issue that reconnection is possible to fail
because unexpected state handling happens by the irqs. To fix the issue,
the driver disables the controller's irqs when disconnected.

Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---

Remarks:
 - A new file in v2

 drivers/usb/gadget/udc/renesas_usb3.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 0e70163..5caf78b 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -623,6 +623,13 @@ static void usb3_disconnect(struct renesas_usb3 *usb3)
 	usb3_usb2_pullup(usb3, 0);
 	usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 	usb3_reset_epc(usb3);
+	usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
+			   USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
+			   USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
+			   USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
+			   USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
+	usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+	usb3_init_epc_registers(usb3);
 
 	if (usb3->driver)
 		usb3->driver->disconnect(&usb3->gadget);
-- 
1.9.1

WARNING: multiple messages have this Message-ID (diff)
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: balbi@kernel.org
Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org, stable@vger.kernel.org,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [v2,6/6] usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting
Date: Tue, 10 Apr 2018 14:38:54 +0900	[thread overview]
Message-ID: <1523338734-20474-7-git-send-email-yoshihiro.shimoda.uh@renesas.com> (raw)

This patch fixes an issue that reconnection is possible to fail
because unexpected state handling happens by the irqs. To fix the issue,
the driver disables the controller's irqs when disconnected.

Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---

Remarks:
 - A new file in v2

 drivers/usb/gadget/udc/renesas_usb3.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 0e70163..5caf78b 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -623,6 +623,13 @@ static void usb3_disconnect(struct renesas_usb3 *usb3)
 	usb3_usb2_pullup(usb3, 0);
 	usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 	usb3_reset_epc(usb3);
+	usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
+			   USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
+			   USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
+			   USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
+			   USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
+	usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+	usb3_init_epc_registers(usb3);
 
 	if (usb3->driver)
 		usb3->driver->disconnect(&usb3->gadget);

  parent reply	other threads:[~2018-04-10  5:39 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-10  5:38 [PATCH v2 0/6] usb: gadget: udc: renesas_usb3: fix some major issues Yoshihiro Shimoda
2018-04-10  5:38 ` [PATCH v2 1/6] usb: gadget: udc: renesas_usb3: fix double phy_put() Yoshihiro Shimoda
2018-04-10  5:38   ` [v2,1/6] " Yoshihiro Shimoda
2018-04-10  5:38 ` [PATCH v2 2/6] usb: gadget: udc: renesas_usb3: should remove debugfs Yoshihiro Shimoda
2018-04-10  5:38   ` [v2,2/6] " Yoshihiro Shimoda
2018-04-10  5:38 ` [PATCH v2 3/6] usb: gadget: udc: renesas_usb3: should call pm_runtime_enable() before add udc Yoshihiro Shimoda
2018-04-10  5:38   ` [v2,3/6] " Yoshihiro Shimoda
2018-04-10  5:38 ` [PATCH v2 4/6] usb: gadget: udc: renesas_usb3: should call devm_phy_get() " Yoshihiro Shimoda
2018-04-10  5:38   ` [v2,4/6] " Yoshihiro Shimoda
2018-04-10  5:38 ` [PATCH v2 5/6] usb: gadget: udc: renesas_usb3: should fail if devm_phy_get() returns error Yoshihiro Shimoda
2018-04-10  5:38   ` [v2,5/6] " Yoshihiro Shimoda
2018-04-10  9:35   ` [PATCH v2 5/6] " Simon Horman
2018-04-10  9:35     ` [v2,5/6] " Simon Horman
2018-05-15  7:31   ` [PATCH v2 5/6] " Simon Horman
2018-05-15  7:31     ` [v2,5/6] " Simon Horman
2018-04-10  5:38 ` Yoshihiro Shimoda [this message]
2018-04-10  5:38   ` [v2,6/6] usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting Yoshihiro Shimoda
2018-04-10  9:34   ` [PATCH v2 6/6] " Simon Horman
2018-04-10  9:34     ` [v2,6/6] " Simon Horman
2018-05-15  7:35   ` [PATCH v2 6/6] " Simon Horman
2018-05-15  7:35     ` [v2,6/6] " Simon Horman
2018-05-15  7:49     ` [PATCH v2 6/6] " Yoshihiro Shimoda
2018-05-15  7:49       ` [v2,6/6] " Yoshihiro Shimoda
2018-05-15  7:55       ` [PATCH v2 6/6] " Simon Horman
2018-05-15  7:55         ` [v2,6/6] " Simon Horman
2018-05-10  7:25 ` [PATCH v2 0/6] usb: gadget: udc: renesas_usb3: fix some major issues Yoshihiro Shimoda

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