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authorMathias Nyman <mathias.nyman@linux.intel.com>2013-06-17 09:56:33 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-18 10:53:54 -0700
commit025f880cb2e4d7218d0422d4b07bea1a68959c38 (patch)
tree45c4268d69df2830ee2ad4bdfcbfc7a2b57ca481 /drivers/usb
parent45778ff4dab7e5f26ace74f7289c6f377d772c99 (diff)
xhci: check for failed dma pool allocation
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> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/xhci-mem.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index b0d789e31f9..df6978abd7e 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -373,6 +373,10 @@ static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci
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;
}