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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2015-09-21 17:46:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-21 22:48:53 -0700 |
| commit | a6809ffd1687b3a8c192960e69add559b9d32649 (patch) | |
| tree | bcc01c97a15fffb9213ba21389b9c1189a03f4c7 | |
| parent | ff30cbc8da425754e8ab96904db1d295bd034f27 (diff) | |
| download | linux-a6809ffd1687b3a8c192960e69add559b9d32649.tar.gz linux-a6809ffd1687b3a8c192960e69add559b9d32649.tar.bz2 linux-a6809ffd1687b3a8c192960e69add559b9d32649.zip | |
xhci: give command abortion one more chance before killing xhci
We want to give the command abortion an additional try to stop
the command ring before we completely hose xhci.
Cc: <stable@vger.kernel.org>
Tested-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index a47a1e897086..1c61e5e597a8 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -302,6 +302,15 @@ static int xhci_abort_cmd_ring(struct xhci_hcd *xhci) ret = xhci_handshake(&xhci->op_regs->cmd_ring, CMD_RING_RUNNING, 0, 5 * 1000 * 1000); if (ret < 0) { + /* we are about to kill xhci, give it one more chance */ + xhci_write_64(xhci, temp_64 | CMD_RING_ABORT, + &xhci->op_regs->cmd_ring); + udelay(1000); + ret = xhci_handshake(&xhci->op_regs->cmd_ring, + CMD_RING_RUNNING, 0, 3 * 1000 * 1000); + if (ret == 0) + return 0; + xhci_err(xhci, "Stopped the command ring failed, " "maybe the host is dead\n"); xhci->xhc_state |= XHCI_STATE_DYING; |