| From | Greg Kroah-Hartman <> | Subject | [ 10/38] xhci: check for failed dma pool allocation | Date | Thu, 18 Jul 2013 22:21:26 -0700 |
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3.9-stable review patch. If anyone has any objections, please let me know.
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From: Mathias Nyman <mathias.nyman@linux.intel.com>
commit 025f880cb2e4d7218d0422d4b07bea1a68959c38 upstream.
Fail and free the container context in case dma_pool_alloc() can't allocate the raw context data part of it
This patch should be backported to kernels as old as 2.6.31, that contain the commit d115b04818e57bdbc7ccde4d0660b15e33013dc8 "USB: xhci: Support for 64-byte contexts".
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: John Youn <johnyoun@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/host/xhci-mem.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -369,6 +369,10 @@ static struct xhci_container_ctx *xhci_a ctx->size += CTX_SIZE(xhci->hcc_params); ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma); + if (!ctx->bytes) { + kfree(ctx); + return NULL; + } memset(ctx->bytes, 0, ctx->size); return ctx; }
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