From ba9f39a785a9977e72233000711ef1eb48203551 Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Mon, 10 Dec 2018 17:52:37 +0100
Subject: [PATCH] mmc: core: Allow BKOPS and CACHE ctrl even if no HPI support
Git-commit: ba9f39a785a9977e72233000711ef1eb48203551
Patch-mainline: v4.20
References: bsc#1051510

In commit 5320226a0512 ("mmc: core: Disable HPI for certain Hynix eMMC
cards"), then intent was to prevent HPI from being used for some eMMC
cards, which didn't properly support it. However, that went too far, as
even BKOPS and CACHE ctrl became prevented. Let's restore those parts and
allow BKOPS and CACHE ctrl even if HPI isn't supported.

Fixes: 5320226a0512 ("mmc: core: Disable HPI for certain Hynix eMMC cards")
Cc: Pratibhasagar V <pratibha@codeaurora.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/mmc/core/mmc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index f0e8e39a7938..a9b6e64cdcd7 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -526,8 +526,7 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 			card->cid.year += 16;
 
 		/* check whether the eMMC card supports BKOPS */
-		if (!mmc_card_broken_hpi(card) &&
-		    ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
+		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 			card->ext_csd.bkops = 1;
 			card->ext_csd.man_bkops_en =
 					(ext_csd[EXT_CSD_BKOPS_EN] &
@@ -1793,8 +1792,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 * If cache size is higher than 0, this indicates
 	 * the existence of cache and it can be turned on.
 	 */
-	if (!mmc_card_broken_hpi(card) &&
-	    card->ext_csd.cache_size > 0) {
+	if (card->ext_csd.cache_size > 0) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 				EXT_CSD_CACHE_CTRL, 1,
 				card->ext_csd.generic_cmd6_time);
-- 
2.19.2