mmc: android-goldfish: fix bad logic of sg_copy_{from,to}_buffer conversion

[ Upstream commit 17e96d8516e31c3cb52cb8e2ee79d1d2e6948c11 ]

The conversion to sg_copy_{from,to}_buffer has been done in the wrong
way. sg_copy_to_buffer is a copy from an SG list to a linear buffer so
it can't replace memcpy(dest, host->virt_base, data->sg->length) where
dest is the virtual address of the SG. Same for sg_copy_from_buffer
but in the opposite way.

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Suggested-by: Douglas Gilbert <dgilbert@interlog.com>
Fixes: 53d7e098ba08 ("mmc: android-goldfish: use sg_copy_{from,to}_buffer")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/host/android-goldfish.c b/drivers/mmc/host/android-goldfish.c
index 294de17..61e4e2a 100644 (file)
--- a/drivers/mmc/host/android-goldfish.c
+++ b/drivers/mmc/host/android-goldfish.c
@@ -217,7 +217,7 @@ static void goldfish_mmc_xfer_done(struct goldfish_mmc_host *host,
                         * We don't really have DMA, so we need
                         * to copy from our platform driver buffer
                         */
-                       sg_copy_to_buffer(data->sg, 1, host->virt_base,
+                       sg_copy_from_buffer(data->sg, 1, host->virt_base,
                                        data->sg->length);
                }
                host->data->bytes_xfered += data->sg->length;
@@ -393,7 +393,7 @@ static void goldfish_mmc_prepare_data(struct goldfish_mmc_host *host,
                 * We don't really have DMA, so we need to copy to our
                 * platform driver buffer
                 */
-               sg_copy_from_buffer(data->sg, 1, host->virt_base,
+               sg_copy_to_buffer(data->sg, 1, host->virt_base,
                                data->sg->length);
        }
 }