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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2009-11-04 07:02:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-11-18 01:46:34 +0100 |
| commit | d94c05e33d9212ee67b8d4998f984cc71df8168b (patch) | |
| tree | 9973d10bb0e1730af6145655fec4cde3a79a54c2 /drivers/usb/host/xhci-mem.c | |
| parent | USB: cdc_acm: Fix memory leak after hangup (diff) | |
| download | linux-d94c05e33d9212ee67b8d4998f984cc71df8168b.tar.xz linux-d94c05e33d9212ee67b8d4998f984cc71df8168b.zip | |
USB: xhci: Fix bug memory free after failed initialization.
If the xHCI driver fails during the memory initialization, xhci->ir_set
may not be a valid pointer. Check that it points to valid DMA'able memory
before writing to that address during the memory freeing process.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 1db4fea8c170..732580c6cbea 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -802,9 +802,11 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci) int i; /* Free the Event Ring Segment Table and the actual Event Ring */ - xhci_writel(xhci, 0, &xhci->ir_set->erst_size); - xhci_write_64(xhci, 0, &xhci->ir_set->erst_base); - xhci_write_64(xhci, 0, &xhci->ir_set->erst_dequeue); + if (xhci->ir_set) { + xhci_writel(xhci, 0, &xhci->ir_set->erst_size); + xhci_write_64(xhci, 0, &xhci->ir_set->erst_base); + xhci_write_64(xhci, 0, &xhci->ir_set->erst_dequeue); + } size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries); if (xhci->erst.entries) pci_free_consistent(pdev, size, |