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sfc: check async completer is !NULL before calling

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Add a NULL check before calling asynchronous MCDI completion functions
during device removal.

Fixes: 7014d7f6 ("sfc: allow asynchronous MCDI without completion function")
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bert Kenward 2016-09-22 15:47:45 +01:00 • committed by David S. Miller
commit 429baa6f0e
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/sfc/mcdi.c
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@ -1156,7 +1156,8 @@ void efx_mcdi_flush_async(struct efx_nic *efx)
* acquired locks in the wrong order.
*/
list_for_each_entry_safe(async, next, &mcdi->async_list, list) {
async->complete(efx, async->cookie, -ENETDOWN, NULL, 0);
if (async->complete)
async->complete(efx, async->cookie, -ENETDOWN, NULL, 0);
list_del(&async->list);
kfree(async);
}