3 files changed, 31 insertions, 3 deletions

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index c528017d6128..c2e120b11bef 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -323,6 +323,17 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr)
 
         mmc_attach_bus(host, &mmc_ops);
 
+        /*
+         * Sanity check the voltages that the card claims to
+         * support.
+         */
+        if (ocr & 0x7F) {
+                printk(KERN_WARNING "%s: card claims to support voltages "
+                       "below the defined range. These will be ignored.\n",
+                       mmc_hostname(host));
+                ocr &= ~0x7F;
+        }
+
         host->ocr = mmc_select_voltage(host, ocr);
 
         /*
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 6c6beb48f3a8..fb18b301502e 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -297,6 +297,24 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr)
 
         mmc_attach_bus(host, &mmc_sd_ops);
 
+        /*
+         * Sanity check the voltages that the card claims to
+         * support.
+         */
+        if (ocr & 0x7F) {
+                printk(KERN_WARNING "%s: card claims to support voltages "
+                       "below the defined range. These will be ignored.\n",
+                       mmc_hostname(host));
+                ocr &= ~0x7F;
+        }
+
+        if (ocr & MMC_VDD_165_195) {
+                printk(KERN_WARNING "%s: SD card claims to support the "
+                       "incompletely defined 'low voltage range'. This "
+                       "will be ignored.\n", mmc_hostname(host));
+                ocr &= ~MMC_VDD_165_195;
+        }
+
         host->ocr = mmc_select_voltage(host, ocr);
 
         /*
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a57f6a3d48d3..ff5bf73cdd25 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -659,8 +659,7 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
         pwr = SDHCI_POWER_ON;
 
         switch (1 << power) {
-        case MMC_VDD_17_18:
-        case MMC_VDD_18_19:
+        case MMC_VDD_165_195:
                 pwr |= SDHCI_POWER_180;
                 break;
         case MMC_VDD_29_30:
@@ -1280,7 +1279,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
         if (caps & SDHCI_CAN_VDD_300)
                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
         if (caps & SDHCI_CAN_VDD_180)
-                mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
+                mmc->ocr_avail |= MMC_VDD_165_195;
 
         if (mmc->ocr_avail == 0) {
                 printk(KERN_ERR "%s: Hardware doesn't report any "