[PATCH v2 1/1] cxgb3: fix up vpd strings for kstrto*()

[Steve Wise]

The vpd strings are left justified, in a fixed length array, with possible
trailing white space and no NUL.  So fix them up before calling kstrto*().

This is a recent regression which causes cxgb3 to fail to load.

Fixes:e72c932('cxgb3: Convert simple_strtoul to kstrtox')

Signed-off-by: Steve Wise <sw...@opengridcomputing.com>
---

Changes since v1:
- checkpatched (forgot to do that initially)
- minor code format tweaks per review feedback

---
 drivers/net/ethernet/chelsio/cxgb3/t3_hw.c | 34 ++++++++++++++++++++++++------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c 
b/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
index ee04caa..a89721f 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/t3_hw.c
@@ -681,6 +681,24 @@ int t3_seeprom_wp(struct adapter *adapter, int enable)
        return t3_seeprom_write(adapter, EEPROM_STAT_ADDR, enable ? 0xc : 0);
 }
 
+static int vpdstrtouint(char *s, int len, unsigned int base, unsigned int *val)
+{
+       char tok[len + 1];
+
+       memcpy(tok, s, len);
+       tok[len] = 0;
+       return kstrtouint(strim(tok), base, val);
+}
+
+static int vpdstrtou16(char *s, int len, unsigned int base, u16 *val)
+{
+       char tok[len + 1];
+
+       memcpy(tok, s, len);
+       tok[len] = 0;
+       return kstrtou16(strim(tok), base, val);
+}
+
 /**
  *     get_vpd_params - read VPD parameters from VPD EEPROM
  *     @adapter: adapter to read
@@ -709,19 +727,19 @@ static int get_vpd_params(struct adapter *adapter, struct 
vpd_params *p)
                        return ret;
        }
 
-       ret = kstrtouint(vpd.cclk_data, 10, &p->cclk);
+       ret = vpdstrtouint(vpd.cclk_data, vpd.cclk_len, 10, &p->cclk);
        if (ret)
                return ret;
-       ret = kstrtouint(vpd.mclk_data, 10, &p->mclk);
+       ret = vpdstrtouint(vpd.mclk_data, vpd.mclk_len, 10, &p->mclk);
        if (ret)
                return ret;
-       ret = kstrtouint(vpd.uclk_data, 10, &p->uclk);
+       ret = vpdstrtouint(vpd.uclk_data, vpd.uclk_len, 10, &p->uclk);
        if (ret)
                return ret;
-       ret = kstrtouint(vpd.mdc_data, 10, &p->mdc);
+       ret = vpdstrtouint(vpd.mdc_data, vpd.mdc_len, 10, &p->mdc);
        if (ret)
                return ret;
-       ret = kstrtouint(vpd.mt_data, 10, &p->mem_timing);
+       ret = vpdstrtouint(vpd.mt_data, vpd.mt_len, 10, &p->mem_timing);
        if (ret)
                return ret;
        memcpy(p->sn, vpd.sn_data, SERNUM_LEN);
@@ -733,10 +751,12 @@ static int get_vpd_params(struct adapter *adapter, struct 
vpd_params *p)
        } else {
                p->port_type[0] = hex_to_bin(vpd.port0_data[0]);
                p->port_type[1] = hex_to_bin(vpd.port1_data[0]);
-               ret = kstrtou16(vpd.xaui0cfg_data, 16, &p->xauicfg[0]);
+               ret = vpdstrtou16(vpd.xaui0cfg_data, vpd.xaui0cfg_len, 16,
+                                 &p->xauicfg[0]);
                if (ret)
                        return ret;
-               ret = kstrtou16(vpd.xaui1cfg_data, 16, &p->xauicfg[1]);
+               ret = vpdstrtou16(vpd.xaui1cfg_data, vpd.xaui1cfg_len, 16,
+                                 &p->xauicfg[1]);
                if (ret)
                        return ret;
        }
-- 
2.7.0