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From: Ludovic Barre <ludovic.barre@st.com>
To: Ulf Hansson <ulf.hansson@linaro.org>, Rob Herring <robh+dt@kernel.org>
Cc: <srinivas.kandagatla@linaro.org>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-mmc@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	Ludovic Barre <ludovic.barre@st.com>
Subject: [PATCH V2 1/2] mmc: mmci_sdmmc: fix clear busyd0end irq flag
Date: Wed, 25 Mar 2020 15:34:08 +0100
Message-ID: <20200325143409.13005-2-ludovic.barre@st.com> (raw)
In-Reply-To: <20200325143409.13005-1-ludovic.barre@st.com>

The busyd0 line transition can be very fast. The busy request
may be completed by busy_d0end without wait the busy_d0 steps.
The busyd0end irq flag must be cleared even if no busy_status.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
 drivers/mmc/host/mmci_stm32_sdmmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c b/drivers/mmc/host/mmci_stm32_sdmmc.c
index f76e82f8f12f..d33e62bd6153 100644
--- a/drivers/mmc/host/mmci_stm32_sdmmc.c
+++ b/drivers/mmc/host/mmci_stm32_sdmmc.c
@@ -358,11 +358,11 @@ static bool sdmmc_busy_complete(struct mmci_host *host, u32 status, u32 err_msk)
 	if (host->busy_status) {
 		writel_relaxed(mask & ~host->variant->busy_detect_mask,
 			       base + MMCIMASK0);
-		writel_relaxed(host->variant->busy_detect_mask,
-			       base + MMCICLEAR);
 		host->busy_status = 0;
 	}
 
+	writel_relaxed(host->variant->busy_detect_mask, base + MMCICLEAR);
+
 	return true;
 }
 
-- 
2.17.1


  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 14:34 [PATCH V2 0/2] mmc: mmci_sdmmc: fixes and improvements Ludovic Barre
2020-03-25 14:34 ` Ludovic Barre [this message]
2020-03-26 14:28   ` [PATCH V2 1/2] mmc: mmci_sdmmc: fix clear busyd0end irq flag Ulf Hansson
2020-03-25 14:34 ` [PATCH V2 2/2] mmc: mmci: initialize pwr|clk|datactrl_reg with their hardware values Ludovic Barre
2020-03-26 14:27   ` Ulf Hansson
2020-04-01 14:56     ` Ludovic BARRE

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