[PATCH] drivers: mmc: check the return value of mmc_send_if_cond() call

[Matt Ranostay]

Return value from mmc_send_if_cond() isn't checked if it is a error state
and the result immediately is overwritten with the sd_send_op_cond() call.

Add check for -EOPNOTSUPP to fail early, and trigger a retry for any other
error code.

Fixes: afd5932b2c27 ("Revert "mmc: retry the cmd8 to meet 74 clocks requirement in the spec")
Signed-off-by: Matt Ranostay <mranostay at ti.com>
---
 drivers/mmc/mmc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 0b7c0be8cbc..e26a457a74c 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -2862,6 +2862,13 @@ retry:
 
 	/* Test for SD version 2 */
 	err = mmc_send_if_cond(mmc);
+	if (err == -EOPNOTSUPP)
+		return err;
+
+	if (err) {
+		mmc_power_cycle(mmc);
+		goto retry;
+	}
 
 	/* Now try to get the SD card's operating condition */
 	err = sd_send_op_cond(mmc, uhs_en);
-- 
2.38.GIT