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-rw-r--r--src/sys/arch/amd64/io/pci/bar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sys/arch/amd64/io/pci/bar.c b/src/sys/arch/amd64/io/pci/bar.c
index d3cfd0b..265d873 100644
--- a/src/sys/arch/amd64/io/pci/bar.c
+++ b/src/sys/arch/amd64/io/pci/bar.c
@@ -46,7 +46,7 @@ pci_bar_size(struct pci_device *dev, uint8_t bar)
uint32_t reg_tmp, reg;
uint8_t barreg = pci_get_barreg(bar);
- if (dev == NULL) {
+ if (dev == NULL || barreg == 0) {
return -EINVAL;
}