linux-kernel - [PATCH 3.2 132/147] sfc: Merge efx_mcdi_mac_check_fault() and efx_mcdi_get_mac

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Date:   Mon, 06 Nov 2017 23:03:07 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Ben Hutchings" <bhutchings@...arflare.com>
Subject: [PATCH 3.2 132/147] sfc: Merge efx_mcdi_mac_check_fault() and
 efx_mcdi_get_mac_faults()

3.2.95-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <bhutchings@...arflare.com>

commit 1daf417029ddc10b7854430c1e1118df791d0eaf upstream.

The latter is only called by the former, which is a very short
wrapper.  Further, gcc 4.5 may currently wrongly warn that the
'faults' variable may be used uninitialised.

Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
[bwh: Backported to 3.2: keep efx_mcdi_get_mac_faults() static]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/ethernet/sfc/mcdi_mac.c | 25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)

--- a/drivers/net/ethernet/sfc/mcdi_mac.c
+++ b/drivers/net/ethernet/sfc/mcdi_mac.c
@@ -54,7 +54,7 @@ int efx_mcdi_set_mac(struct efx_nic *efx
 			    NULL, 0, NULL);
 }
 
-static int efx_mcdi_get_mac_faults(struct efx_nic *efx, u32 *faults)
+static bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
 {
 	u8 outbuf[MC_CMD_GET_LINK_OUT_LEN];
 	size_t outlength;
@@ -64,16 +64,13 @@ static int efx_mcdi_get_mac_faults(struc
 
 	rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 			  outbuf, sizeof(outbuf), &outlength);
-	if (rc)
-		goto fail;
+	if (rc) {
+		netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
+			  __func__, rc);
+		return true;
+	}
 
-	*faults = MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT);
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
-		  __func__, rc);
-	return rc;
+	return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
 }
 
 int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
@@ -132,14 +129,6 @@ static int efx_mcdi_mac_reconfigure(stru
 }
 
 
-static bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
-{
-	u32 faults;
-	int rc = efx_mcdi_get_mac_faults(efx, &faults);
-	return (rc != 0) || (faults != 0);
-}
-
-
 const struct efx_mac_operations efx_mcdi_mac_operations = {
 	.reconfigure	= efx_mcdi_mac_reconfigure,
 	.update_stats	= efx_port_dummy_op_void,