mmc: bcm2835: Fix dma_unmap_sg() nents value

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: 2f5da678351f ("mmc: bcm2835: Properly handle dmaengine_prep_slave_sg")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250630093510.82871-2-fourier.thomas@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index def054ddd2562819c5db0c343695ed3ee2185cc9..4fced9b36c80ad6534c789aaa372d3e808c70456 100644 (file)
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -503,7 +503,8 @@ void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data)
                                       DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 
        if (!desc) {
-               dma_unmap_sg(dma_chan->device->dev, data->sg, sg_len, dir_data);
+               dma_unmap_sg(dma_chan->device->dev, data->sg, data->sg_len,
+                            dir_data);
                return;
        }