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path: root/drivers/usb/core/devio.c
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Diffstat (limited to 'drivers/usb/core/devio.c')
-rw-r--r--drivers/usb/core/devio.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index c8075eb3db26..fa619354c5c5 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1838,6 +1838,18 @@ static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg)
return 0;
}
+static void compute_isochronous_actual_length(struct urb *urb)
+{
+ unsigned int i;
+
+ if (urb->number_of_packets > 0) {
+ urb->actual_length = 0;
+ for (i = 0; i < urb->number_of_packets; i++)
+ urb->actual_length +=
+ urb->iso_frame_desc[i].actual_length;
+ }
+}
+
static int processcompl(struct async *as, void __user * __user *arg)
{
struct urb *urb = as->urb;
@@ -1845,6 +1857,7 @@ static int processcompl(struct async *as, void __user * __user *arg)
void __user *addr = as->userurb;
unsigned int i;
+ compute_isochronous_actual_length(urb);
if (as->userbuffer && urb->actual_length) {
if (copy_urb_data_to_user(as->userbuffer, urb))
goto err_out;
@@ -2019,6 +2032,7 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
void __user *addr = as->userurb;
unsigned int i;
+ compute_isochronous_actual_length(urb);
if (as->userbuffer && urb->actual_length) {
if (copy_urb_data_to_user(as->userbuffer, urb))
return -EFAULT;