diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c
index 246dc62..9fdb927 100644
--- a/drivers/mmc/host/via-sdmmc.c
+++ b/drivers/mmc/host/via-sdmmc.c
@@ -1273,11 +1273,14 @@
 static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state)
 {
 	struct via_crdr_mmc_host *host;
+	unsigned long flags;
 
 	host = pci_get_drvdata(pcidev);
 
+	spin_lock_irqsave(&host->lock, flags);
 	via_save_pcictrlreg(host);
 	via_save_sdcreg(host);
+	spin_unlock_irqrestore(&host->lock, flags);
 
 	pci_save_state(pcidev);
 	pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);