drivers/net/ethernet/sfc/ptp.c: adjust duplicate test

[ Upstream commit 56567c6f8751c633581ca7c8e1cf08eed503f5ea ]

Delete successive tests to the same location.  rc was previously tested and
not subsequently updated.  efx_phc_adjtime can return an error code, so the
call is updated so that is tested instead.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@s exists@
local idexpression y;
expression x,e;
@@

*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\)
    when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\)
*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
index 0767043f44a42866d545a8ff843604a3d717af48..3f93624fc27313134fa0682bc67cf154d8af0a31 100644 (file)
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -1439,7 +1439,7 @@ static int efx_phc_settime(struct ptp_clock_info *ptp,
 
        delta = timespec_sub(*e_ts, time_now);
 
-       efx_phc_adjtime(ptp, timespec_to_ns(&delta));
+       rc = efx_phc_adjtime(ptp, timespec_to_ns(&delta));
        if (rc != 0)
                return rc;