The pciWrite32 function assembled the array of data to be written to the fd with a bad offset on the last byte. This issue was probably caused by a typo (14, 24). --- src/util/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/util/pci.c b/src/util/pci.c index cf7722d..418c83d 100644 --- a/src/util/pci.c +++ b/src/util/pci.c @@ -268,7 +268,7 @@ pciWrite16(pciDevice *dev, int cfgfd, unsigned pos, uint16_t val) static void pciWrite32(pciDevice *dev, int cfgfd, unsigned pos, uint32_t val) { - uint8_t buf[4] = { (val >> 0), (val >> 8), (val >> 16), (val >> 14) }; + uint8_t buf[4] = { (val >> 0), (val >> 8), (val >> 16), (val >> 24) }; pciWrite(dev, cfgfd, pos, &buf[0], sizeof(buf)); }