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usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting

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commit bd6bce004d upstream.

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: 746bfe63bb ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda 2018-04-10 14:38:54 +09:00 committed by Greg Kroah-Hartman
parent 262af4fe6d
commit d6a9e699a3
1 changed files with 7 additions and 0 deletions
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7
drivers/usb/gadget/udc/renesas_usb3.c
View file

@ -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);