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xhci: Remove BUG_ON in xhci_get_input_control_ctx.

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Fail gracefully, instead of causing the kernel to panic, if the input
control context doesn't have the right type (XHCI_CTX_TYPE_INPUT).  Push
finding the pointer to the input control context up into functions that
can fail.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: John Youn <johnyoun@synopsys.com>
This commit is contained in:
Sarah Sharp
2013-04-23 17:11:14 -07:00
parent 29f9d54b63
commit 92f8e76769
4 changed files with 128 additions and 37 deletions
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4
drivers/usb/host/xhci-mem.c
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@@ -389,7 +389,9 @@ static void xhci_free_container_ctx(struct xhci_hcd *xhci,
struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx)
{
BUG_ON(ctx->type != XHCI_CTX_TYPE_INPUT);
if (ctx->type != XHCI_CTX_TYPE_INPUT)
return NULL;
return (struct xhci_input_control_ctx *)ctx->bytes;
}