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-rw-r--r--util/flashrom/flashrom.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/util/flashrom/flashrom.c b/util/flashrom/flashrom.c
index dce303ed3f..842d473a1e 100644
--- a/util/flashrom/flashrom.c
+++ b/util/flashrom/flashrom.c
@@ -381,8 +381,8 @@ int main(int argc, char *argv[])
pci_init(pacc); /* Initialize the PCI library */
pci_scan_bus(pacc); /* We want to get the list of devices */
- /* Open the memory device. A lot of functions need it */
- if ((fd_mem = open(MEM_DEV, O_RDWR)) < 0) {
+ /* Open the memory device UNCACHED. That's important for MMIO. */
+ if ((fd_mem = open(MEM_DEV, O_RDWR|O_SYNC)) < 0) {
perror("Error: Can not access memory using " MEM_DEV
". You need to be root.");
exit(1);