linux-kernel - [PATCH] mmc: core: Do not require secure trim for discard

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Date:   Mon, 14 Nov 2022 13:26:55 +0000
From:   Christian Löhle <CLoehle@...erstone.com>
To:     "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>
Subject: [PATCH] mmc: core: Do not require secure trim for discard

Discard feature is independent of security features.
The support check for all trims and discard falsely checked
for secure trim/discard, but in the discard case this is not
mandated by the spec.

Signed-off-by: Christian Loehle <cloehle@...erstone.com>
---
 drivers/mmc/core/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 95fa8fb1d45f..507005211529 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1761,7 +1761,8 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
 		return -EOPNOTSUPP;
 
 	if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) &&
-	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
+	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) &&
+	    arg != MMC_DISCARD_ARG)
 		return -EOPNOTSUPP;
 
 	if (arg == MMC_SECURE_ERASE_ARG) {
-- 
2.37.3

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