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-next>] [day] [month] [year] [list]
Message-ID: <20170831124820.21423-1-nicolas.ferre@microchip.com>
Date:   Thu, 31 Aug 2017 14:48:20 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        <linux-arm-kernel@...ts.infradead.org>, <balbi@...nel.org>,
        <linux-usb@...r.kernel.org>
CC:     Boris BREZILLON <boris.brezillon@...e-electrons.com>,
        Quentin Schulz <quentin.schulz@...e-electrons.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        <linux-kernel@...r.kernel.org>, <gregkh@...uxfoundation.org>,
        Nicolas Ferre <nicolas.ferre@...el.com>,
        "stable # v4 . 4+" <stable@...r.kernel.org>
Subject: [PATCH] usb: gadget: udc: atmel: set vbus irqflags explicitly

From: Nicolas Ferre <nicolas.ferre@...el.com>

The driver triggers actions on both edges of the vbus signal.

The former PIO controller was triggering IRQs on both falling and rising edges
by default. Newer PIO controller don't, so it's better to set it explicitly to
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING.

Without this patch we may trigger the connection with host but only on some
bouncing signal conditions and thus lose connecting events.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: stable <stable@...r.kernel.org> # v4.4+
---
 drivers/usb/gadget/udc/atmel_usba_udc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 98d71400f8a1..a884c022df7a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -29,6 +29,8 @@
 #include <linux/of_gpio.h>
 
 #include "atmel_usba_udc.h"
+#define USBA_VBUS_IRQFLAGS (IRQF_ONESHOT \
+			   | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING)
 
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 #include <linux/debugfs.h>
@@ -2361,7 +2363,7 @@ static int usba_udc_probe(struct platform_device *pdev)
 					IRQ_NOAUTOEN);
 			ret = devm_request_threaded_irq(&pdev->dev,
 					gpio_to_irq(udc->vbus_pin), NULL,
-					usba_vbus_irq_thread, IRQF_ONESHOT,
+					usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS,
 					"atmel_usba_udc", udc);
 			if (ret) {
 				udc->vbus_pin = -ENODEV;
-- 
2.9.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ