diff options
| author | Karsten Wiese <fzuuzf@googlemail.com> | 2009-02-26 01:47:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-17 14:01:29 -0700 |
| commit | 508db8c954d55ed30f870d2c24d741ba6269d13c (patch) | |
| tree | aed956a468d6d2dcd6103554f535aed978eec4fe /drivers | |
| parent | 9ea19b82f3126da4e47d6b94563a3c2cd586f6e2 (diff) | |
| download | linux-508db8c954d55ed30f870d2c24d741ba6269d13c.tar.gz linux-508db8c954d55ed30f870d2c24d741ba6269d13c.tar.bz2 linux-508db8c954d55ed30f870d2c24d741ba6269d13c.zip | |
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')
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 10 |
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); |