From 185d40587d22fe604962fb53c0c9a9f1670feb66 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 18 Jul 2007 10:58:02 -0700 Subject: USB: class: cdc-acm: clean up urb->status usage This done in anticipation of removal of urb->status, which will make that patch easier to review and apply in the future. Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'drivers/usb/class/cdc-acm.c') diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index cd51520c7e72..fe940e0536e0 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -257,9 +257,10 @@ static void acm_ctrl_irq(struct urb *urb) struct usb_cdc_notification *dr = urb->transfer_buffer; unsigned char *data; int newctrl; - int status; + int retval; + int status = urb->status; - switch (urb->status) { + switch (status) { case 0: /* success */ break; @@ -267,10 +268,10 @@ static void acm_ctrl_irq(struct urb *urb) case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ - dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); + dbg("%s - urb shutting down with status: %d", __FUNCTION__, status); return; default: - dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); + dbg("%s - nonzero urb status received: %d", __FUNCTION__, status); goto exit; } @@ -311,10 +312,10 @@ static void acm_ctrl_irq(struct urb *urb) break; } exit: - status = usb_submit_urb (urb, GFP_ATOMIC); - if (status) + retval = usb_submit_urb (urb, GFP_ATOMIC); + if (retval) err ("%s - usb_submit_urb failed with result %d", - __FUNCTION__, status); + __FUNCTION__, retval); } /* data interface returns incoming bytes, or we got unthrottled */ @@ -324,7 +325,8 @@ static void acm_read_bulk(struct urb *urb) struct acm_ru *rcv = urb->context; struct acm *acm = rcv->instance; int status = urb->status; - dbg("Entering acm_read_bulk with status %d", urb->status); + + dbg("Entering acm_read_bulk with status %d", status); if (!ACM_READY(acm)) return; -- cgit v1.2.3 From 74da5d68a54d66667664fbe233ededab2376a070 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 2 Aug 2007 13:29:10 -0400 Subject: USB: cdc-acm: fix sysfs attribute registration bug This patch (as950) fixes a bug in the cdc-acm driver. It doesn't keep track of which interface (control or data) the sysfs attributes get registered for, and as a result, during disconnect it will sometimes attempt to remove the attributes from the wrong interface. The left-over attributes can cause a crash later on, particularly if the driver module has been unloaded. Signed-off-by: Alan Stern Acked-by: Oliver Neukum Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'drivers/usb/class/cdc-acm.c') diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index fe940e0536e0..f51e22490edf 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -921,6 +921,10 @@ skip_normal_probe: return -EINVAL; } } + + /* Accept probe requests only for the control interface */ + if (intf != control_interface) + return -ENODEV; if (usb_interface_claimed(data_interface)) { /* valid in this context */ dev_dbg(&intf->dev,"The data interface isn't available"); @@ -1109,10 +1113,12 @@ static void acm_disconnect(struct usb_interface *intf) return; } if (acm->country_codes){ - device_remove_file(&intf->dev, &dev_attr_wCountryCodes); - device_remove_file(&intf->dev, &dev_attr_iCountryCodeRelDate); + device_remove_file(&acm->control->dev, + &dev_attr_wCountryCodes); + device_remove_file(&acm->control->dev, + &dev_attr_iCountryCodeRelDate); } - device_remove_file(&intf->dev, &dev_attr_bmCapabilities); + device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); -- cgit v1.2.3