diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2010-03-01 17:18:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 15:58:32 -0700 |
| commit | 43763b6eece07ec97e36e00205c3d54f4a57754e (patch) | |
| tree | 3513fd92524f850ec044a3c50e0d4e67918b1188 /drivers | |
| parent | 5fe90f08a129e9fd8bda0e0c54746eb7b5297768 (diff) | |
USB: EHCI: adjust ehci_iso_stream for changes in ehci_qh
commit 1082f57abfa26590b60c43f503afb24102a37016 upstream.
The EHCI driver stores in usb_host_endpoint.hcpriv a pointer to either
an ehci_qh or an ehci_iso_stream structure, and uses the contents of the
hw_info1 field to distinguish the two cases.
After ehci_qh was split into hw and sw parts, ehci_iso_stream must also
be adjusted so that it again looks like an ehci_qh structure.
This fixes a NULL pointer access in ehci_endpoint_disable() when it
tries to access qh->hw->hw_info1.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-by: Colin Fletcher <colin.m.fletcher@googlemail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 2 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 4 | ||||
| -rw-r--r-- | drivers/usb/host/ehci.h | 5 |
3 files changed, 5 insertions, 6 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index e18c6773809..35bf5180618 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -993,7 +993,7 @@ rescan: /* endpoints can be iso streams. for now, we don't * accelerate iso completions ... so spin a while. */ - if (qh->hw->hw_info1 == 0) { + if (qh->hw == NULL) { ehci_vdbg (ehci, "iso delay\n"); goto idle_timeout; } diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 344fc2c73ee..5cc3f48ef3d 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -1121,8 +1121,8 @@ iso_stream_find (struct ehci_hcd *ehci, struct urb *urb) urb->interval); } - /* if dev->ep [epnum] is a QH, info1.maxpacket is nonzero */ - } else if (unlikely (stream->hw_info1 != 0)) { + /* if dev->ep [epnum] is a QH, hw is set */ + } else if (unlikely (stream->hw != NULL)) { ehci_dbg (ehci, "dev %s ep%d%s, not iso??\n", urb->dev->devpath, epnum, usb_pipein(urb->pipe) ? "in" : "out"); diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 2d85e21ff28..b1dce96dd62 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -394,9 +394,8 @@ struct ehci_iso_sched { * acts like a qh would, if EHCI had them for ISO. */ struct ehci_iso_stream { - /* first two fields match QH, but info1 == 0 */ - __hc32 hw_next; - __hc32 hw_info1; + /* first field matches ehci_hq, but is NULL */ + struct ehci_qh_hw *hw; u32 refcount; u8 bEndpointAddress; |