It's horrible coding style to panic the kernel when someone passes you an argument value you didn't expect.
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: Sarah Sharp <[email protected]> Cc: John Youn <[email protected]> Cc: [email protected] --- drivers/usb/host/xhci-mem.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index fbf75e5..1a2052d 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -358,11 +358,15 @@ int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring, static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, int type, gfp_t flags) { - struct xhci_container_ctx *ctx = kzalloc(sizeof(*ctx), flags); + struct xhci_container_ctx *ctx; + + if ((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT)) + return NULL; + + ctx = kzalloc(sizeof(*ctx), flags); if (!ctx) return NULL; - BUG_ON((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT)); ctx->type = type; ctx->size = HCC_64BYTE_CONTEXT(xhci->hcc_params) ? 2048 : 1024; if (type == XHCI_CTX_TYPE_INPUT) -- 1.7.9 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
