From: Faiz Abbas <faiz_abbas@ti.com>
To: <linux-kernel@vger.kernel.org>, <linux-mmc@vger.kernel.org>,
<linux-omap@vger.kernel.org>
Cc: <ulf.hansson@linaro.org>, <kishon@ti.com>,
<adrian.hunter@intel.com>, <faiz_abbas@ti.com>
Subject: [PATCH v4 2/2] mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning
Date: Tue, 26 Mar 2019 16:30:57 +0530 [thread overview]
Message-ID: <20190326110057.7055-3-faiz_abbas@ti.com> (raw)
In-Reply-To: <20190326110057.7055-1-faiz_abbas@ti.com>
commit 5b0d62108b46 ("mmc: sdhci-omap: Add platform specific reset
callback") skips data resets during tuning operation. Because of this,
a data error or data finish interrupt might still arrive after a command
error has been handled and the mrq ended. This ends up with a "mmc0: Got
data interrupt 0x00000002 even though no data operation was in progress"
error message.
Fix this by adding a platform specific callback for sdhci_irq. Mark the
mrq as a failure but wait for a data interrupt instead of calling
finish_mrq().
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
---
drivers/mmc/host/sdhci-omap.c | 37 +++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 5bbed477c9b1..9da2ff9ede8b 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -797,6 +797,42 @@ void sdhci_omap_reset(struct sdhci_host *host, u8 mask)
sdhci_reset(host, mask);
}
+#define CMD_ERR_MASK (SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX |\
+ SDHCI_INT_TIMEOUT)
+#define CMD_MASK (CMD_ERR_MASK | SDHCI_INT_RESPONSE)
+
+static irqreturn_t sdhci_omap_irq(struct sdhci_host *host, u32 intmask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
+
+ if (omap_host->is_tuning && (intmask & CMD_ERR_MASK)) {
+
+ /*
+ * Since we are not resetting data lines during tuning
+ * operation, data error or data complete interrupts
+ * might still arrive. Mark this request as a failure
+ * but still wait for the data interrupt
+ */
+ if (intmask & SDHCI_INT_TIMEOUT)
+ host->cmd->error = -ETIMEDOUT;
+ else
+ host->cmd->error = -EILSEQ;
+
+ sdhci_finish_command(host);
+
+ /*
+ * Sometimes command error interrupts and command complete
+ * interrupt will arrive together. Clear all command related
+ * interrupts here.
+ */
+ sdhci_writel(host, intmask & CMD_MASK, SDHCI_INT_STATUS);
+ intmask &= ~CMD_MASK;
+ }
+
+ return intmask;
+}
+
static struct sdhci_ops sdhci_omap_ops = {
.set_clock = sdhci_omap_set_clock,
.set_power = sdhci_omap_set_power,
@@ -807,6 +843,7 @@ static struct sdhci_ops sdhci_omap_ops = {
.platform_send_init_74_clocks = sdhci_omap_init_74_clocks,
.reset = sdhci_omap_reset,
.set_uhs_signaling = sdhci_omap_set_uhs_signaling,
+ .irq = sdhci_omap_irq,
};
static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host)
--
2.19.2
next prev parent reply other threads:[~2019-03-26 11:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-26 11:00 [PATCH v4 0/2] Fix command errors during tuning Faiz Abbas
2019-03-26 11:00 ` [PATCH v4 1/2] mmc: sdhci: Export sdhci_finish_command() Faiz Abbas
2019-03-26 11:00 ` Faiz Abbas [this message]
2019-03-27 11:15 ` [PATCH v4 2/2] mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning Adrian Hunter
2019-03-27 11:47 ` Faiz Abbas
2019-03-28 8:13 ` Adrian Hunter
2019-03-29 7:42 ` Faiz Abbas
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