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drivers: net: smc91x: Fix set but unused W=1 warning

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drivers/net/ethernet/smsc/smc91x.c:706:51: warning: variable ‘pkt_len’ set but not used [-Wunused-but-set-variable]
  706 |  unsigned int saved_packet, packet_no, tx_status, pkt_len;

The read of the packet length in the descriptor probably needs to be
kept in order to keep the hardware happy. So tell the compiler we
don't expect to use the value by using the __always_unused attribute.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Andrew Lunn 2020-11-10 04:02:42 +01:00 committed by Jakub Kicinski
parent cef211968c
commit 5b320b5343
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/smsc/smc91x.c
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@ -703,7 +703,8 @@ static void smc_tx(struct net_device *dev)
{
struct smc_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->base;
unsigned int saved_packet, packet_no, tx_status, pkt_len;
unsigned int saved_packet, packet_no, tx_status;
unsigned int pkt_len __always_unused;
DBG(3, dev, "%s\n", __func__);