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vmci: fix buf_size in case of iovec-based accesses 

Both qp_dequeue_locked() and qp_enqueue_locked() use the
buf_size argument to decide how much would be there to copy;
in case of iovec- (== msghdr-)based primitives it's not
iov_size, it's msg_data_left(msg).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-07-14 16:08:29 -04:00
parent 4fbd8d194f
commit 19c5b89d8d
1 changed files with 3 additions and 3 deletions
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6
drivers/misc/vmw_vmci/vmci_queue_pair.c
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@ -3253,7 +3253,7 @@ ssize_t vmci_qpair_enquev(struct vmci_qp *qpair,
result = qp_enqueue_locked(qpair->produce_q,
qpair->consume_q,
qpair->produce_q_size,
msg, iov_size,
msg, msg_data_left(msg),
qp_memcpy_to_queue_iov);
if (result == VMCI_ERROR_QUEUEPAIR_NOT_READY &&
@ -3295,7 +3295,7 @@ ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
result = qp_dequeue_locked(qpair->produce_q,
qpair->consume_q,
qpair->consume_q_size,
msg, iov_size,
msg, msg_data_left(msg),
qp_memcpy_from_queue_iov,
true);
@ -3339,7 +3339,7 @@ ssize_t vmci_qpair_peekv(struct vmci_qp *qpair,
result = qp_dequeue_locked(qpair->produce_q,
qpair->consume_q,
qpair->consume_q_size,
msg, iov_size,
msg, msg_data_left(msg),
qp_memcpy_from_queue_iov,
false);