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staging: vchiq_core: Bail out in case of invalid tx_pos 

Properly handle the error case in case of an invalid tx_pos.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Wahren 2017-05-26 00:26:25 +02:00 committed by Greg Kroah-Hartman
parent 6f2370d260
commit d1eab9dec6
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
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@ -600,8 +600,10 @@ reserve_space(VCHIQ_STATE_T *state, size_t space, int is_blocking)
return NULL; /* No space available */
}
BUG_ON(tx_pos ==
(state->slot_queue_available * VCHIQ_SLOT_SIZE));
if (tx_pos == (state->slot_queue_available * VCHIQ_SLOT_SIZE)) {
pr_warn("%s: invalid tx_pos: %d\n", __func__, tx_pos);
return NULL;
}
slot_index = local->slot_queue[
SLOT_QUEUE_INDEX_FROM_POS(tx_pos) &