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 <l...@intel.com>
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>

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-...@lists.01.org

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