This is a note to let you know that I've just added the patch titled
Subject: USB: ldusb should signal an error in poll if the device is disconnected
to my gregkh-2.6 tree. Its filename is
usb-ldusb-should-signal-an-error-in-poll-if-the-device-is-disconnected.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From oliver@xxxxxxxxxx Fri Jul 10 15:18:16 2009
From: Oliver Neukum <oliver@xxxxxxxxxx>
Date: Thu, 2 Jul 2009 17:01:06 +0200
Subject: USB: ldusb should signal an error in poll if the device is disconnected
To: Michael Hund <mhund@xxxxxxxxxxxxxx>, greg@xxxxxxxxx, USB list <linux-usb@xxxxxxxxxxxxxxx>
Message-ID: <200907021701.06689.oliver@xxxxxxxxxx>
poll() should test for a disconnection of the device.
Signed-off-by: Oliver Neukum <oliver@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/misc/ldusb.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -412,6 +412,9 @@ static unsigned int ld_usb_poll(struct f
dev = file->private_data;
+ if (!dev->intf)
+ return POLLERR | POLLHUP;
+
poll_wait(file, &dev->read_wait, wait);
poll_wait(file, &dev->write_wait, wait);
@@ -767,6 +770,9 @@ static void ld_usb_disconnect(struct usb
ld_usb_delete(dev);
} else {
dev->intf = NULL;
+ /* wake up pollers */
+ wake_up_interruptible_all(&dev->read_wait);
+ wake_up_interruptible_all(&dev->write_wait);
mutex_unlock(&dev->mutex);
}
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
