If we don't have any data to transfer, we must not set the block size and block count. If data is NULL, accessing data to get the block size and block count is a NULL pointer dereference. Signed-off-by: Michael Tretter <m.tretter@xxxxxxxxxxxxxx> --- drivers/mci/arasan-sdhci.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/mci/arasan-sdhci.c b/drivers/mci/arasan-sdhci.c index 399966e8cf10..3d738774e825 100644 --- a/drivers/mci/arasan-sdhci.c +++ b/drivers/mci/arasan-sdhci.c @@ -283,10 +283,12 @@ static int arasan_sdhci_send_cmd(struct mci_host *mci, struct mci_cmd *cmd, sdhci_set_cmd_xfer_mode(&host->sdhci, cmd, data, false, &command, &xfer); sdhci_write8(&host->sdhci, SDHCI_TIMEOUT_CONTROL, TIMEOUT_VAL); - sdhci_write16(&host->sdhci, SDHCI_TRANSFER_MODE, xfer); - sdhci_write16(&host->sdhci, SDHCI_BLOCK_SIZE, SDHCI_DMA_BOUNDARY_512K | - SDHCI_TRANSFER_BLOCK_SIZE(data->blocksize)); - sdhci_write16(&host->sdhci, SDHCI_BLOCK_COUNT, data->blocks); + if (data) { + sdhci_write16(&host->sdhci, SDHCI_TRANSFER_MODE, xfer); + sdhci_write16(&host->sdhci, SDHCI_BLOCK_SIZE, + SDHCI_DMA_BOUNDARY_512K | SDHCI_TRANSFER_BLOCK_SIZE(data->blocksize)); + sdhci_write16(&host->sdhci, SDHCI_BLOCK_COUNT, data->blocks); + } sdhci_write32(&host->sdhci, SDHCI_ARGUMENT, cmd->cmdarg); sdhci_write16(&host->sdhci, SDHCI_COMMAND, command); -- 2.29.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox