1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 547eb857b1b3..4e82f64a96bc 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1126,9 +1126,12 @@ static int mmc_spi_get_ro(struct mmc_host *mmc)
         struct mmc_spi_host *host = mmc_priv(mmc);
 
         if (host->pdata && host->pdata->get_ro)
-                return host->pdata->get_ro(mmc->parent);
-        /* board doesn't support read only detection; assume writeable */
-        return 0;
+                return !!host->pdata->get_ro(mmc->parent);
+        /*
+         * Board doesn't support read only detection; let the mmc core
+         * decide what to do.
+         */
+        return -ENOSYS;
 }
 
 static int mmc_spi_get_cd(struct mmc_host *mmc)