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xhci: check for failed dma pool allocation

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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 d115b04818 "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>
This commit is contained in:
Mathias Nyman 2013-06-17 09:56:33 -07:00 committed by Greg Kroah-Hartman
parent 45778ff4da
commit 025f880cb2
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/host/xhci-mem.c
View file

@ -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;
}