The Meson SDIO controller uses the DAT0 lane for hardware busy detection. Set MMC_CAP_WAIT_WHILE_BUSY accordingly. This fixes the following error observed with Linux 5.7 (pre-rc-1): mmc1: Card stuck being busy! __mmc_poll_for_busy blk_update_request: I/O error, dev mmcblk1, sector 17111080 op 0x3:(DISCARD) flags 0x0 phys_seg 1 prio class 0 Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> --- I'm sending this as RFC because I'm not sure if this is a proper fix. It "fixes" the issue for me but I want the MMC maintainers to double- check this. drivers/mmc/host/meson-mx-sdio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/meson-mx-sdio.c b/drivers/mmc/host/meson-mx-sdio.c index 8b038e7b2cd3..fe02130237a8 100644 --- a/drivers/mmc/host/meson-mx-sdio.c +++ b/drivers/mmc/host/meson-mx-sdio.c @@ -570,7 +570,7 @@ static int meson_mx_mmc_add_host(struct meson_mx_mmc_host *host) mmc->f_max = clk_round_rate(host->cfg_div_clk, clk_get_rate(host->parent_clk)); - mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23; + mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23 | MMC_CAP_WAIT_WHILE_BUSY; mmc->ops = &meson_mx_mmc_ops; ret = mmc_of_parse(mmc); -- 2.26.0
