linux-kernel - [ 23/98] drivers/net/ethernet/sfc/ptp.c: adjust duplicate test

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Date:	Tue, 26 Mar 2013 15:42:12 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Julia Lawall <Julia.Lawall@...6.fr>,
	Ben Hutchings <bhutchings@...arflare.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 23/98] drivers/net/ethernet/sfc/ptp.c: adjust duplicate test

3.8-stable review patch.  If anyone has any objections, please let me know.

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


From: Julia Lawall <Julia.Lawall@...6.fr>

[ 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@...6.fr>
Acked-by: Ben Hutchings <bhutchings@...arflare.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/sfc/ptp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_cl
 
 	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;
 


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