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net/ibmvnic: prevent more than one thread from running in reset

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The current code allows more than one thread to run in reset. This can
corrupt struct adapter data. Check adapter->resetting before performing
a reset, if there is another reset running delay (100 msec) before trying
again.

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
2019-09-20 16:11:23 -04:00
committed by David S. Miller
parent b27507bb59
commit 7ed5b31f4a
2 changed files with 34 additions and 11 deletions
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5
drivers/net/ethernet/ibm/ibmvnic.h
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@@ -39,6 +39,8 @@
#define IBMVNIC_MAX_LTB_SIZE ((1 << (MAX_ORDER - 1)) * PAGE_SIZE)
#define IBMVNIC_BUFFER_HLEN 500
#define IBMVNIC_RESET_DELAY 100
static const char ibmvnic_priv_flags[][ETH_GSTRING_LEN] = {
#define IBMVNIC_USE_SERVER_MAXES 0x1
"use-server-maxes"
@@ -1077,7 +1079,8 @@ struct ibmvnic_adapter {
spinlock_t rwi_lock;
struct list_head rwi_list;
struct work_struct ibmvnic_reset;
bool resetting;
struct delayed_work ibmvnic_delayed_reset;
unsigned long resetting;
bool napi_enabled, from_passive_init;
bool failover_pending;