Re: [PATCH 2/2] net: dsa: qca8k: introduce SGMII configuration options

From: Dan Carpenter
Date: Fri Jun 19 2020 - 04:15:31 EST

Hi Jonathan,

url: https://github.com/0day-ci/linux/commits/Jonathan-McDowell/net-dsa-qca8k-Add-SGMII-configuration-options/20200606-021254
base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: i386-randconfig-m021-20200618 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

smatch warnings:
drivers/net/dsa/qca8k.c:438 qca8k_setup_sgmii() error: uninitialized symbol 'mode'.

# https://github.com/0day-ci/linux/commit/27dd896d27e5048d2c402879fb04f6e23536ea72
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 27dd896d27e5048d2c402879fb04f6e23536ea72
vim +/mode +438 drivers/net/dsa/qca8k.c

27dd896d27e5048 Jonathan McDowell 2020-06-05 421 static int
27dd896d27e5048 Jonathan McDowell 2020-06-05 422 qca8k_setup_sgmii(struct qca8k_priv *priv)
27dd896d27e5048 Jonathan McDowell 2020-06-05 423 {
27dd896d27e5048 Jonathan McDowell 2020-06-05 424 const char *mode;
^^^^

27dd896d27e5048 Jonathan McDowell 2020-06-05 425 u32 val;
27dd896d27e5048 Jonathan McDowell 2020-06-05 426
27dd896d27e5048 Jonathan McDowell 2020-06-05 427 val = qca8k_read(priv, QCA8K_REG_SGMII_CTRL);
27dd896d27e5048 Jonathan McDowell 2020-06-05 428
27dd896d27e5048 Jonathan McDowell 2020-06-05 429 val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX |
27dd896d27e5048 Jonathan McDowell 2020-06-05 430 QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;
27dd896d27e5048 Jonathan McDowell 2020-06-05 431
27dd896d27e5048 Jonathan McDowell 2020-06-05 432 if (of_property_read_bool(priv->dev->of_node, "sgmii-delay"))
27dd896d27e5048 Jonathan McDowell 2020-06-05 433 val |= QCA8K_SGMII_CLK125M_DELAY;
27dd896d27e5048 Jonathan McDowell 2020-06-05 434
27dd896d27e5048 Jonathan McDowell 2020-06-05 435 if (of_property_read_string(priv->dev->of_node, "sgmii-mode", &mode)) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This if condition is reversed.

27dd896d27e5048 Jonathan McDowell 2020-06-05 436 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
27dd896d27e5048 Jonathan McDowell 2020-06-05 437
27dd896d27e5048 Jonathan McDowell 2020-06-05 @438 if (!strcasecmp(mode, "basex")) {
27dd896d27e5048 Jonathan McDowell 2020-06-05 439 val |= QCA8K_SGMII_MODE_CTRL_BASEX;
27dd896d27e5048 Jonathan McDowell 2020-06-05 440 } else if (!strcasecmp(mode, "mac")) {
27dd896d27e5048 Jonathan McDowell 2020-06-05 441 val |= QCA8K_SGMII_MODE_CTRL_MAC;
27dd896d27e5048 Jonathan McDowell 2020-06-05 442 } else if (!strcasecmp(mode, "phy")) {
27dd896d27e5048 Jonathan McDowell 2020-06-05 443 val |= QCA8K_SGMII_MODE_CTRL_PHY;
27dd896d27e5048 Jonathan McDowell 2020-06-05 444 } else {
27dd896d27e5048 Jonathan McDowell 2020-06-05 445 pr_err("Unrecognised SGMII mode %s\n", mode);
27dd896d27e5048 Jonathan McDowell 2020-06-05 446 return -EINVAL;
27dd896d27e5048 Jonathan McDowell 2020-06-05 447 }
27dd896d27e5048 Jonathan McDowell 2020-06-05 448 }
27dd896d27e5048 Jonathan McDowell 2020-06-05 449
27dd896d27e5048 Jonathan McDowell 2020-06-05 450 qca8k_write(priv, QCA8K_REG_SGMII_CTRL, val);
27dd896d27e5048 Jonathan McDowell 2020-06-05 451
27dd896d27e5048 Jonathan McDowell 2020-06-05 452 return 0;
27dd896d27e5048 Jonathan McDowell 2020-06-05 453 }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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