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ibmvnic: Remove VNIC_CLOSING check from pending_scrq

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Fix a kernel panic resulting from data access of a NULL
pointer during device close. The pending_scrq routine is
meant to determine whether there is a valid sub-CRQ message
awaiting processing. When the device is closing, however,
there is a possibility that NULL messages can be processed
because pending_scrq will always return 1 even if there
no valid message in the queue.

It's not clear what this closing state check was originally
meant to accomplish, so just remove it.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon 2017-06-14 23:50:08 -05:00 committed by David S. Miller
parent c8b2ad0a4a
commit 1cf9cc72bd
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/ibm/ibmvnic.c
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@ -2275,8 +2275,7 @@ static int pending_scrq(struct ibmvnic_adapter *adapter,
{
union sub_crq *entry = &scrq->msgs[scrq->cur];
if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
adapter->state == VNIC_CLOSING)
if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
return 1;
else
return 0;