Re: [PATCH 4/6] net: arc: trivial: cleanup the emac driver

kbuild test robot
2016-03-11T11:28:18Z

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Hi Caesar,

[auto build test WARNING on next-20160311]
[also build test WARNING on v4.5-rc7]
[cannot apply to rockchip/for-next net-next/master v4.5-rc7 v4.5-rc6 v4.5-rc5]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url: https://github.com/0day-ci/linux/commits/Caesar-Wang/net-arc_emac-make-the-rockchip-emac-document-more-compatible/20160311-190611
config: alpha-allyesconfig (attached as .config)
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=alpha

All warnings (new ones prefixed by >>):

drivers/net/ethernet/arc/emac_main.c: In function 'arc_emac_open':
>> drivers/net/ethernet/arc/emac_main.c:468:7: warning: overflow in implicit constant conversion [-Woverflow]
(RX_BD_NUM << 24) | /* RX BD table length */
^

vim +468 drivers/net/ethernet/arc/emac_main.c

e4f2379d Alexey Brodkin 2013-06-24 452 /* Clean Tx BD's */
e4f2379d Alexey Brodkin 2013-06-24 453 memset(priv->txbd, 0, TX_RING_SZ);
e4f2379d Alexey Brodkin 2013-06-24 454
e4f2379d Alexey Brodkin 2013-06-24 455 /* Initialize logical address filter */
e4f2379d Alexey Brodkin 2013-06-24 456 arc_reg_set(priv, R_LAFL, 0);
e4f2379d Alexey Brodkin 2013-06-24 457 arc_reg_set(priv, R_LAFH, 0);
e4f2379d Alexey Brodkin 2013-06-24 458
e4f2379d Alexey Brodkin 2013-06-24 459 /* Set BD ring pointers for device side */
e4f2379d Alexey Brodkin 2013-06-24 460 arc_reg_set(priv, R_RX_RING, (unsigned int)priv->rxbd_dma);
e4f2379d Alexey Brodkin 2013-06-24 461 arc_reg_set(priv, R_TX_RING, (unsigned int)priv->txbd_dma);
e4f2379d Alexey Brodkin 2013-06-24 462
e4f2379d Alexey Brodkin 2013-06-24 463 /* Enable interrupts */
7ce7679d Beniamino Galvani 2014-09-10 464 arc_reg_set(priv, R_ENABLE, RXINT_MASK | TXINT_MASK | ERR_MASK);
e4f2379d Alexey Brodkin 2013-06-24 465
e4f2379d Alexey Brodkin 2013-06-24 466 /* Set CONTROL */
e4f2379d Alexey Brodkin 2013-06-24 467 arc_reg_set(priv, R_CTRL,
e4f2379d Alexey Brodkin 2013-06-24 @468 (RX_BD_NUM << 24) | /* RX BD table length */
e4f2379d Alexey Brodkin 2013-06-24 469 (TX_BD_NUM << 16) | /* TX BD table length */
e4f2379d Alexey Brodkin 2013-06-24 470 TXRN_MASK | RXRN_MASK);
e4f2379d Alexey Brodkin 2013-06-24 471
e4f2379d Alexey Brodkin 2013-06-24 472 napi_enable(&priv->napi);
e4f2379d Alexey Brodkin 2013-06-24 473
e4f2379d Alexey Brodkin 2013-06-24 474 /* Enable EMAC */
e4f2379d Alexey Brodkin 2013-06-24 475 arc_reg_or(priv, R_CTRL, EN_MASK);
e4f2379d Alexey Brodkin 2013-06-24 476

:::::: The code at line 468 was first introduced by commit
:::::: e4f2379db6c6823c5d4a4c2c912df00c65de51d7 ethernet/arc/arc_emac - Add new driver

:::::: TO: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
:::::: CC: David S. Miller <davem@davemloft.net>

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