diff mbox series

[net-next,v2,4/7] drivers: net: smc911x: Fix set but unused status because of DBG macro

Message ID 20201104154858.1247725-5-andrew@lunn.ch
State Changes Requested
Delegated to: David Miller
Headers show
Series smsc W=1 warning fixes | expand

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jkicinski/stable success Stable not CCed
jkicinski/header_inline success Link
jkicinski/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
jkicinski/checkpatch success total: 0 errors, 0 warnings, 0 checks, 11 lines checked
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jkicinski/kdoc success Errors and warnings before: 0 this patch: 0
jkicinski/build_32bit success Errors and warnings before: 0 this patch: 0
jkicinski/module_param success Was 0 now: 0
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jkicinski/source_inline success Was 0 now: 0
jkicinski/subject_prefix success Link
jkicinski/tree_selection success Clearly marked for net-next
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jkicinski/fixes_present success Link
jkicinski/cover_letter success Link

Commit Message

Andrew Lunn Nov. 4, 2020, 3:48 p.m. UTC
drivers/net/ethernet/smsc/smc911x.c: In function ‘smc911x_timeout’:
drivers/net/ethernet/smsc/smc911x.c:1251:6: warning: variable ‘status’ set but not used [-Wunused-but-set-variable]
 1251 |  int status, mask;

The status is read in order to print it via the DBG macro. However,
due to the way DBG is disabled, the compiler never sees it being used.

Change the DBG macro to actually make use of the passed parameters,
and the leave the optimiser to remove the unwanted code inside the
while (0).

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/ethernet/smsc/smc911x.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/smsc/smc911x.c b/drivers/net/ethernet/smsc/smc911x.c
index 8f748a0c057e..6978050496ac 100644
--- a/drivers/net/ethernet/smsc/smc911x.c
+++ b/drivers/net/ethernet/smsc/smc911x.c
@@ -102,7 +102,10 @@  MODULE_ALIAS("platform:smc911x");
 
 #define PRINTK(dev, args...)   netdev_info(dev, args)
 #else
-#define DBG(n, dev, args...)   do { } while (0)
+#define DBG(n, dev, args...)			 \
+	while (0) {				 \
+		netdev_dbg(dev, args);		 \
+	}
 #define PRINTK(dev, args...)   netdev_dbg(dev, args)
 #endif