diff options
| author | Al Cooper <alcooperx@gmail.com> | 2014-09-11 13:55:49 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-05 13:40:58 -0700 |
| commit | 714f9e749dd87c07dcf261fdbacb38c578cda0c2 (patch) | |
| tree | 8516ea0a45f877665dc05d36bd99601495083d3f /drivers | |
| parent | a8a48a03cf59cacfea21acba190ddc4de77be60b (diff) | |
usb: xhci: Fix OOPS in xhci error handling code
commit 0eda06c7c17ae48d7db69beef57f6e2b20bc3c72 upstream.
The xhci driver will OOPS on resume from S2/S3 if dma_alloc_coherent()
is out of memory. This is a result of two things:
1. xhci_mem_cleanup() in xhci-mem.c free's xhci->lpm_command if
it's not NULL, but doesn't set it to NULL after the free.
2. xhci_mem_cleanup() is called twice on resume, once for normal
restart and once from xhci_mem_init() if dma_alloc_coherent() fails,
resulting in a free of xhci->lpm_command that has already been freed.
The fix is to set xhci->lpm_command to NULL after freeing it.
Signed-off-by: Al Cooper <alcooperx@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 7432a52323e0..8936211b161d 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1812,6 +1812,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) if (xhci->lpm_command) xhci_free_command(xhci, xhci->lpm_command); + xhci->lpm_command = NULL; if (xhci->cmd_ring) xhci_ring_free(xhci, xhci->cmd_ring); xhci->cmd_ring = NULL; |