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DM USB: xHCI: Fix XHCI_GET_SLOT value check issue

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Fix XHCI_GET_SLOT macro check slot valid function, when the
slot value is bigger than XHCI_MAX_SLOT set the slot value
to zero.

Tracked-On: #4711

Signed-off-by: Long Liu <long.liu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Long Liu 2020-07-14 10:50:53 +08:00 committed by wenlingz
parent 3c9469d98a
commit f9c44369a0
1 changed files with 2 additions and 1 deletions
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3
devicemodel/hw/pci/xhci.c
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@ -2523,7 +2523,8 @@ done:
#define XHCI_GET_SLOT(xdev, trb, slot, cmderr) \ #define XHCI_GET_SLOT(xdev, trb, slot, cmderr) \
do { \ do { \
slot = (XHCI_TRB_3_SLOT_GET(trb->dwTrb3)) ? 0 : \ slot = (XHCI_TRB_3_SLOT_GET(trb->dwTrb3) > \
XHCI_MAX_SLOTS) ? 0 : \
XHCI_TRB_3_SLOT_GET(trb->dwTrb3); \ XHCI_TRB_3_SLOT_GET(trb->dwTrb3); \
if (!slot) \ if (!slot) \
cmderr = XHCI_TRB_ERROR_INVALID; \ cmderr = XHCI_TRB_ERROR_INVALID; \