From: Rong Chen <rong.chen@amlogic.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Neil Armstrong <narmstrong@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
<1131046452@qq.com>, <linux-mmc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-amlogic@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: <45581586@qq.com>, Rong Chen <rong.chen@amlogic.com>
Subject: [PATCH] mmc: meson: Fix usage of meson_mmc_post_req()
Date: Thu, 6 Jan 2022 18:54:53 +0800 [thread overview]
Message-ID: <20220106105453.3875119-1-rong.chen@amlogic.com> (raw)
To ensure the DMA moves data correctly from memory to
peripherals, DMA unmapping when the MMC request done
with calls meson_mmc_post_req().
Signed-off-by: Rong Chen <rong.chen@amlogic.com>
---
drivers/mmc/host/meson-gx-mmc.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 8f36536cb1b6..6a9554ae4b1c 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -173,6 +173,7 @@ struct meson_host {
int irq;
bool vqmmc_enabled;
+ bool needs_pre_post_req;
};
#define CMD_CFG_LENGTH_MASK GENMASK(8, 0)
@@ -663,6 +664,8 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
struct meson_host *host = mmc_priv(mmc);
host->cmd = NULL;
+ if (host->needs_pre_post_req)
+ meson_mmc_post_req(mmc, mrq, 0);
mmc_request_done(host->mmc, mrq);
}
@@ -880,7 +883,7 @@ static int meson_mmc_validate_dram_access(struct mmc_host *mmc, struct mmc_data
static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct meson_host *host = mmc_priv(mmc);
- bool needs_pre_post_req = mrq->data &&
+ host->needs_pre_post_req = mrq->data &&
!(mrq->data->host_cookie & SD_EMMC_PRE_REQ_DONE);
/*
@@ -896,22 +899,19 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
}
}
- if (needs_pre_post_req) {
+ if (host->needs_pre_post_req) {
meson_mmc_get_transfer_mode(mmc, mrq);
if (!meson_mmc_desc_chain_mode(mrq->data))
- needs_pre_post_req = false;
+ host->needs_pre_post_req = false;
}
- if (needs_pre_post_req)
+ if (host->needs_pre_post_req)
meson_mmc_pre_req(mmc, mrq);
/* Stop execution */
writel(0, host->regs + SD_EMMC_START);
meson_mmc_start_cmd(mmc, mrq->sbc ?: mrq->cmd);
-
- if (needs_pre_post_req)
- meson_mmc_post_req(mmc, mrq, 0);
}
static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
base-commit: 356f3f2c5756bbb67a515760966a40fc7043cdda
--
2.25.1
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next reply other threads:[~2022-01-06 10:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-06 10:54 Rong Chen [this message]
2022-01-24 22:05 ` Kevin Hilman
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