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net/ibmnvic: Fix deadlock problem in reset

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This patch changes to use rtnl_lock only during a reset to avoid
deadlock that could occur when a thread operating close is holding
rtnl_lock and waiting for reset_lock acquired by another thread,
which is waiting for rtnl_lock in order to set the number of tx/rx
queues during a reset.

Also, we now setting the number of tx/rx queues during a soft reset
for failover or LPM events.

Signed-off-by: Juliet Kim <julietk@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Juliet Kim
2018-11-19 15:59:22 -06:00
committed by David S. Miller
parent db9a0bae8f
commit a5681e20b5
2 changed files with 22 additions and 39 deletions
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2
drivers/net/ethernet/ibm/ibmvnic.h
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@@ -1075,7 +1075,7 @@ struct ibmvnic_adapter {
struct tasklet_struct tasklet;
enum vnic_state state;
enum ibmvnic_reset_reason reset_reason;
struct mutex reset_lock, rwi_lock;
struct mutex rwi_lock;
struct list_head rwi_list;
struct work_struct ibmvnic_reset;
bool resetting;