mmc: sdhci-omap: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY

[ Upstream commit 055e04830d4544c57f2a5192a26c9e25915c29c0 ]

It has turned out that the sdhci-omap controller requires the R1B response,
for commands that has this response associated with them. So, converting
from an R1B to an R1 response for a CMD6 for example, leads to problems
with the HW busy detection support.

Fix this by informing the mmc core about the requirement, via setting the
host cap, MMC_CAP_NEED_RSP_BUSY.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Reported-by: Faiz Abbas <faiz_abbas@ti.com>
Cc: <stable@vger.kernel.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 083e7e0..d313524 100644 (file)
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -1134,6 +1134,9 @@ static int sdhci_omap_probe(struct platform_device *pdev)
        host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning;
        host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq;
 
+       /* R1B responses is required to properly manage HW busy detection. */
+       mmc->caps |= MMC_CAP_NEED_RSP_BUSY;
+
        ret = sdhci_setup_host(host);
        if (ret)
                goto err_put_sync;