diff options
| author |   Gregory CLEMENT <gregory.clement@free-electrons.com> | 2016-01-26 17:50:11 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-03 14:01:47 -0800 |
| commit | 2ad294d5f9d13d108c1e2f1a4be8542859ead134 (patch) | |
| tree | da813026a36e2dd49343045d470ee1a7b4db48b7 | |
| parent | usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling (diff) | |
| download | linux-dev-2ad294d5f9d13d108c1e2f1a4be8542859ead134.tar.xz linux-dev-2ad294d5f9d13d108c1e2f1a4be8542859ead134.zip | |
usb: host: xhci-plat: fix NULL pointer in probe for device tree case
During probe, in the device tree case, the data pointer associated to a
compatible is dereferenced. However, not all the compatibles are
associated to a private data pointer.
The generic-xhci and the xhci-platform don't need them, this patch adds a
test on the data pointer before accessing it, avoiding a kernel crash.
Fixes: 4efb2f694114 ("usb: host: xhci-plat: add struct xhci_plat_priv")
Cc: stable@vger.kernel.org
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.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-plat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index 770b6b088797..d39d6bf1d090 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -184,7 +184,8 @@ static int xhci_plat_probe(struct platform_device *pdev) struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); /* Just copy data for now */ - *priv = *priv_match; + if (priv_match) + *priv = *priv_match; } if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) { |