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authorKarsten Wiese <fzuuzf@googlemail.com>2009-02-26 01:47:48 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-17 14:01:29 -0700
commit508db8c954d55ed30f870d2c24d741ba6269d13c (patch)
treeaed956a468d6d2dcd6103554f535aed978eec4fe /drivers/usb/host/ehci-sched.c
parent9ea19b82f3126da4e47d6b94563a3c2cd586f6e2 (diff)
downloadlinux-stericsson-508db8c954d55ed30f870d2c24d741ba6269d13c.tar.gz
USB: EHCI: Fix isochronous URB leak
ehci-hcd uses usb_get_urb() and usb_put_urb() in an unbalanced way causing isochronous URB's kref.counts incrementing once per usb_submit_urb() call. The culprit is *usb being set to NULL when usb_put_urb() is called after URB is given back. Due to other fixes there is no need for ehci-hcd to deal with usb_get_urb() nor usb_put_urb() anymore, so patch removes their usages in ehci-hcd. Patch also makes ehci_to_hcd(ehci)->self.bandwidth_allocated adjust, if a stream finishes. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Cc: David Brownell <david-b@pacbell.net> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
-rw-r--r--drivers/usb/host/ehci-sched.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 07bcb931021b..1d0b49e3f192 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -1536,7 +1536,7 @@ itd_link_urb (
struct ehci_itd, itd_list);
list_move_tail (&itd->itd_list, &stream->td_list);
itd->stream = iso_stream_get (stream);
- itd->urb = usb_get_urb (urb);
+ itd->urb = urb;
itd_init (ehci, stream, itd);
}
@@ -1645,7 +1645,7 @@ itd_complete (
(void) disable_periodic(ehci);
ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs--;
- if (unlikely (list_empty (&stream->td_list))) {
+ if (unlikely(list_is_singular(&stream->td_list))) {
ehci_to_hcd(ehci)->self.bandwidth_allocated
-= stream->bandwidth;
ehci_vdbg (ehci,
@@ -1656,7 +1656,6 @@ itd_complete (
iso_stream_put (ehci, stream);
done:
- usb_put_urb(urb);
itd->urb = NULL;
if (ehci->clock_frame != itd->frame || itd->index[7] != -1) {
/* OK to recycle this ITD now. */
@@ -1949,7 +1948,7 @@ sitd_link_urb (
struct ehci_sitd, sitd_list);
list_move_tail (&sitd->sitd_list, &stream->td_list);
sitd->stream = iso_stream_get (stream);
- sitd->urb = usb_get_urb (urb);
+ sitd->urb = urb;
sitd_patch(ehci, stream, sitd, sched, packet);
sitd_link (ehci, (next_uframe >> 3) % ehci->periodic_size,
@@ -2034,7 +2033,7 @@ sitd_complete (
(void) disable_periodic(ehci);
ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs--;
- if (list_empty (&stream->td_list)) {
+ if (list_is_singular(&stream->td_list)) {
ehci_to_hcd(ehci)->self.bandwidth_allocated
-= stream->bandwidth;
ehci_vdbg (ehci,
@@ -2045,7 +2044,6 @@ sitd_complete (
iso_stream_put (ehci, stream);
/* OK to recycle this SITD now that its completion callback ran. */
done:
- usb_put_urb(urb);
sitd->urb = NULL;
sitd->stream = NULL;
list_move(&sitd->sitd_list, &stream->free_list);