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sfc: cope with ENOSYS from efx_mcdi_get_workarounds()

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GET_WORKAROUNDS was only introduced in May 2014, not all firmware
 will have it.  So call sites need to handle ENOSYS.
In this case we're probing the bug26807 workaround, which is not
 implemented in any firmware that doesn't have GET_WORKAROUNDS.
 So interpret ENOSYS as 'false'.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
2015-07-21 15:09:31 +01:00
committed by David S. Miller
parent 46e612b0fc
commit 832dc9ed43
2 changed files with 24 additions and 13 deletions
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6
drivers/net/ethernet/sfc/mcdi.c
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@@ -1816,7 +1816,11 @@ int efx_mcdi_get_workarounds(struct efx_nic *efx, unsigned int *impl_out,
return 0;
fail:
netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
/* Older firmware lacks GET_WORKAROUNDS and this isn't especially
* terrifying. The call site will have to deal with it though.
*/
netif_printk(efx, hw, rc == -ENOSYS ? KERN_DEBUG : KERN_ERR,
efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
return rc;
}