diff options
| author | Warren Free <wfree@ipmn.com> | 2009-05-08 10:27:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-05-28 13:54:43 -0700 |
| commit | 0afb20e00b5053170c85298fed842b32d20b4ea9 (patch) | |
| tree | 82c4179334f31702bf5379fcfe90ec7dc3c79330 /drivers | |
| parent | cab98a0a349829b145d924c0649a2d30cd6a9e3d (diff) | |
| download | kernel-crypto-0afb20e00b5053170c85298fed842b32d20b4ea9.tar.gz kernel-crypto-0afb20e00b5053170c85298fed842b32d20b4ea9.tar.xz kernel-crypto-0afb20e00b5053170c85298fed842b32d20b4ea9.zip | |
USB: isp1760: urb_dequeue doesn't always find the urbs
The option driver (and presumably others) allocates several URBs when it
opens and tries to free them when it closes. The isp1760_urb_dequeue
function gets called, but the packet being dequeued is not necessarily at
the
front of one of the 32 queues. If not, the isp1760_urb_done function doesn't
get called for the URB and the process trying to free it hangs forever on a
wait_queue. This patch does two things. If the URB being dequeued has others
queued behind it, it re-queues them. And it searches the queues looking for
the URB being dequeued rather than just looking at the one at the front of
the queue.
[bigeasy@linutronix] whitespace fixes, reformating
Cc: stable <stable@kernel.org>
Signed-off-by: Warren Free <wfree@ipmn.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/isp1760-hcd.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c index cd07ea3f0c6..15438469f21 100644 --- a/drivers/usb/host/isp1760-hcd.c +++ b/drivers/usb/host/isp1760-hcd.c @@ -1658,6 +1658,7 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, u32 reg_base, or_reg, skip_reg; unsigned long flags; struct ptd ptd; + packet_enqueue *pe; switch (usb_pipetype(urb->pipe)) { case PIPE_ISOCHRONOUS: @@ -1669,6 +1670,7 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, reg_base = INT_REGS_OFFSET; or_reg = HC_INT_IRQ_MASK_OR_REG; skip_reg = HC_INT_PTD_SKIPMAP_REG; + pe = enqueue_an_INT_packet; break; default: @@ -1676,6 +1678,7 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, reg_base = ATL_REGS_OFFSET; or_reg = HC_ATL_IRQ_MASK_OR_REG; skip_reg = HC_ATL_PTD_SKIPMAP_REG; + pe = enqueue_an_ATL_packet; break; } @@ -1687,6 +1690,7 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, u32 skip_map; u32 or_map; struct isp1760_qtd *qtd; + struct isp1760_qh *qh = ints->qh; skip_map = isp1760_readl(hcd->regs + skip_reg); skip_map |= 1 << i; @@ -1699,8 +1703,7 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base + i * sizeof(ptd), sizeof(ptd)); qtd = ints->qtd; - - clean_up_qtdlist(qtd); + qtd = clean_up_qtdlist(qtd); free_mem(priv, ints->payload); @@ -1711,7 +1714,24 @@ static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, ints->payload = 0; isp1760_urb_done(priv, urb, status); + if (qtd) + pe(hcd, qh, qtd); break; + + } else if (ints->qtd) { + struct isp1760_qtd *qtd, *prev_qtd = ints->qtd; + + for (qtd = ints->qtd->hw_next; qtd; qtd = qtd->hw_next) { + if (qtd->urb == urb) { + prev_qtd->hw_next = clean_up_qtdlist(qtd); + isp1760_urb_done(priv, urb, status); + break; + } + prev_qtd = qtd; + } + /* we found the urb before the end of the list */ + if (qtd) + break; } ints++; } |