mmc: core: Initialize mmc_blk_ioc_data

Commit 4d0c8d0 ("mmc: core: Use mrq.sbc in close-ended ffu") adds
flags uint to struct mmc_blk_ioc_data, but it does not get initialized for
RPMB ioctls which now fails.

Let's fix this by always initializing the struct and flags to zero.

Fixes: 4d0c8d0 ("mmc: core: Use mrq.sbc in close-ended ffu")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218587
Link: https://lore.kernel.org/all/[email protected]/
Cc: [email protected]
Signed-off-by: Mikko Rapeli <[email protected]>
Reviewed-by: Avri Altman <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Tested-by: Francesco Dolcini <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: mikkorapeli-linaro

drivers/mmc/core/block.c

@@ -413,7 +413,7 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
 	struct mmc_blk_ioc_data *idata;
 	int err;
 
-	idata = kmalloc(sizeof(*idata), GFP_KERNEL);
+	idata = kzalloc(sizeof(*idata), GFP_KERNEL);
 	if (!idata) {
 		err = -ENOMEM;
 		goto out;