We already check for MMC_CAP_8_BIT_DATA before trying if buswidth=8
yields legible data. For consistency, don't test whether buswidth=4
works if the MMC host doesn't indicated MMC_CAP_4_BIT_DATA.
Fixes: 68db956d ("mci: Fix 8 bit mmc cards")
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/mci/mci-core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 67257bcd186c..dd163c3d1652 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -1025,6 +1025,9 @@ static int mci_startup_mmc(struct mci *mci)
mci_set_clock(mci, mci->tran_speed);
+ if (!(host->host_caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
+ return 0;
+
/*
* Unlike SD, MMC cards dont have a configuration register to notify
* supported bus width. So bus test command should be run to identify
--
2.25.0
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