mmc: block: Fixup condition for CMD13 polling for RPMB requests

commit 6246d7c9d15aaff0bc3863f67900c6a6e6be921b upstream.

The CMD13 polling is needed for commands with R1B responses. In commit
a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS with R1B
response"), the intent was to introduce this for requests targeted to the
RPMB partition. However, the condition to trigger the polling loop became
wrong, leading to unnecessary polling. Let's fix the condition to avoid
this.

Fixes: a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response")
Cc: stable@vger.kernel.org
Reported-by: Zhan Liu <zliua@micron.com>
Signed-off-by: Zhan Liu <zliua@micron.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Link: https://lore.kernel.org/r/20201202202320.22165-1-huobean@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index fa313b63413547fc664b317c56ec2c0a8d12bbce..ba6f4a65212f7b30a0a711d075b12bfac6342423 100644 (file)
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -580,7 +580,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
 
        memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
 
-       if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) {
+       if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
                /*
                 * Ensure RPMB/R1B command has completed by polling CMD13
                 * "Send Status".