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windows: Properly handle return value of SetupDiOpenDevRegKey(). 

This fixes bug #499.
This commit is contained in:
Aurelien Jacobs 2014-11-27 17:41:23 +01:00
parent 59182fbbbf
commit b328a48b0f
1 changed files with 4 additions and 3 deletions
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7
windows.c
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@ -353,9 +353,10 @@ SP_PRIV enum sp_return get_port_details(struct sp_port *port)
CONFIGRET cr;
/* check if this is the device we are looking for */
if (!(device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
DICS_FLAG_GLOBAL, 0,
DIREG_DEV, KEY_QUERY_VALUE)))
device_key = SetupDiOpenDevRegKey(device_info, &device_info_data,
DICS_FLAG_GLOBAL, 0,
DIREG_DEV, KEY_QUERY_VALUE);
if (device_key == INVALID_HANDLE_VALUE)
continue;
size = sizeof(value);
if (RegQueryValueExA(device_key, "PortName", NULL, &type, (LPBYTE)value,