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Message-ID: <6373cfb97ef24ccfb5236c721f263f1b@hyperstone.com>
Date: Thu, 17 Nov 2022 10:51:48 +0000
From: Christian Löhle <CLoehle@...erstone.com>
To: "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>
CC: "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] mmc: core: Fix ambiguous TRIM and DISCARD arg
Clean up the MMC_TRIM_ARGS define that became ambiguous with
DISCARD introduction.
While at it fix one usage where MMC_TRIM_ARGS falsely included
DISCARD, too.
Fixes: b3bf915308ca ("mmc: core: new discard feature support at eMMC v4.5")
Signed-off-by: Christian Loehle <cloehle@...erstone.com>
---
Previously submitted as mmc: core: Do not require secure trim for discard
drivers/mmc/core/core.c | 10 ++++++++--
include/linux/mmc/mmc.h | 2 +-
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 95fa8fb1d45f..7ce26dbd5879 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1478,6 +1478,11 @@ void mmc_init_erase(struct mmc_card *card)
card->pref_erase = 0;
}
+static bool is_trim_arg(unsigned int arg)
+{
+ return (arg & MMC_TRIM_OR_DISCARD_ARGS) && arg != MMC_DISCARD_ARG;
+}
+
static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
unsigned int arg, unsigned int qty)
{
@@ -1760,7 +1765,7 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
!(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
return -EOPNOTSUPP;
- if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) &&
+ if (mmc_card_mmc(card) && is_trim_arg(arg) &&
!(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
return -EOPNOTSUPP;
@@ -1790,7 +1795,8 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
* identified by the card->eg_boundary flag.
*/
rem = card->erase_size - (from % card->erase_size);
- if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) {
+ if ((arg & MMC_TRIM_OR_DISCARD_ARGS) && (card->eg_boundary) &&
+ (nr > rem)) {
err = mmc_do_erase(card, from, from + rem - 1, arg);
from += rem;
if ((err) || (to <= from))
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 9c50bc40f8ff..6f7993803ee7 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -451,7 +451,7 @@ static inline bool mmc_ready_for_data(u32 status)
#define MMC_SECURE_TRIM1_ARG 0x80000001
#define MMC_SECURE_TRIM2_ARG 0x80008000
#define MMC_SECURE_ARGS 0x80000000
-#define MMC_TRIM_ARGS 0x00008001
+#define MMC_TRIM_OR_DISCARD_ARGS 0x00008003
#define mmc_driver_type_mask(n) (1 << (n))
--
2.37.3
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