As per the JEDEC spec, tuning(command CMD21) is not allowed in
RPMB partition.
To avoid retuning while switching to RPMB, hold_retune variable was
introduced but it is not taken into account while making the tuning
decision. As a consequence of this, mmc driver aborts while switching to
RPMB partition:
mmc0: mmc_hs400_to_hs200 failed, error -84
To fix this, take hold_retune variable into account while making retune
decision in mmc_retune() function.
Fixes: 57da0c042f4a ("mmc: block: Pause re-tuning while switched to the RPMB partition")
Reported-by: Judy Wang <wangjudy@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Shyam Saini <shyamsaini@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/core/host.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index b89dca1f15e9..342c1f5c256b 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -181,6 +181,9 @@ int mmc_retune(struct mmc_host *host)
bool return_to_hs400 = false;
int err;
+ if (host->hold_retune >= 1)
+ return 0;
+
if (host->retune_now)
host->retune_now = 0;
else
--
2.34.1
