From akpm@osdl.org Fri Jun 30 16:40:04 2006 Message-Id: <200606300934.k5U9YiSw001784@shell0.pdx.osdl.net> From: Frank Gevaerts Subject: USB: ipaq.c bugfixes To: greg@kroah.com Cc: akpm@osdl.org, frank.gevaerts@fks.be, lcapitulino@mandriva.com.br Date: Fri, 30 Jun 2006 02:34:44 -0700 From: Frank Gevaerts This patch fixes several problems in the ipaq.c driver with connecting and disconnecting pocketpc devices: * The read urb stayed active if the connect failed, causing nullpointer dereferences later on. * If a write failed, the driver continued as if nothing happened. Now it handles that case the same way as other usb serial devices (fix by Luiz Fernando N. Capitulino ) Signed-off-by: Frank Gevaerts Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/ipaq.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- gregkh-2.6.orig/drivers/usb/serial/ipaq.c +++ gregkh-2.6/drivers/usb/serial/ipaq.c @@ -651,11 +651,6 @@ static int ipaq_open(struct usb_serial_p usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, ipaq_read_bulk_callback, port); - result = usb_submit_urb(port->read_urb, GFP_KERNEL); - if (result) { - err("%s - failed submitting read urb, error %d", __FUNCTION__, result); - goto error; - } /* * Send out control message observed in win98 sniffs. Not sure what @@ -670,6 +665,11 @@ static int ipaq_open(struct usb_serial_p usb_sndctrlpipe(serial->dev, 0), 0x22, 0x21, 0x1, 0, NULL, 0, 100); if (result == 0) { + result = usb_submit_urb(port->read_urb, GFP_KERNEL); + if (result) { + err("%s - failed submitting read urb, error %d", __FUNCTION__, result); + goto error; + } return 0; } } @@ -854,6 +854,7 @@ static void ipaq_write_bulk_callback(str if (urb->status) { dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); + return; } spin_lock_irqsave(&write_list_lock, flags);