tree b36db6117dcc34ffa244b74191bfc78bca85e1bb
parent be1fdbfddb8f753132e781109e72b5f2c64140a2
author Willy Tu <wltu@google.com> 1663958356 +0000
committer Willy Tu <wltu@google.com> 1666021377 +0000

Remove error spam in getGenerationInUse

Cached the linkSpeed that is known to be invalid PCIe type. Only print
the error once to avoid duplicated messages.

Removing the spam to help reduce the noise in the BMC logs.

Tested:
```
systemctl status xyz.openbmc_project.PCIe.service
* xyz.openbmc_project.PCIe.service - Service to get PCIe info over PECI
     Loaded: loaded (/lib/systemd/system/xyz.openbmc_project.PCIe.service; enabled; preset: enabled)
     Active: active (running) since Fri 2018-03-09 15:06:10 UTC; 10min ago
   Main PID: 2382 (peci-pcie)
     CGroup: /system.slice/xyz.openbmc_project.PCIe.service
             `-2382 /usr/bin/peci-pcie

Mar 09 15:06:10 [host] systemd[1]: Started Service to get PCIe info over PECI.
Mar 09 15:06:10 [host] peci-pcie[2382]: PECI set dev names to /dev/peci-default, /dev/peci-0
Mar 09 15:07:20 [host] peci-pcie[2382]: PCIe scan started
Mar 09 15:07:20 [host] peci-pcie[2382]: Link speed : 0 can not mapping to PCIe type list.
Mar 09 15:08:06 [host] peci-pcie[2382]: PCIe scan completed
```

Change-Id: Ie84f3951e80a6c38dd2fdbe853b8e468a249e264
Signed-off-by: Willy Tu <wltu@google.com>