From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
We really don't want to use interrupts while doing a panic dump, so
implement polling.
The mmc panic begin/end ops have also been added for sdhci.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Irina Tirdea <irina.tirdea@xxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e096526..d85e9d5 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -131,6 +131,8 @@ static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
ier &= ~clear;
ier |= set;
sdhci_writel(host, ier, SDHCI_INT_ENABLE);
+ if (mmc_panic_task_active(host->mmc))
+ ier = 0;
sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
}
@@ -1267,6 +1269,8 @@ static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
* *
\*****************************************************************************/
+static irqreturn_t sdhci_irq(int irq, void *dev_id);
+
static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct sdhci_host *host;
@@ -1347,6 +1351,11 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
mmiowb();
sdhci_unlock_irqrestore(host, flags);
+
+ if (mmc_am_panic_task(host->mmc)) {
+ while (host->mrq)
+ sdhci_irq(0, host);
+ }
}
static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
@@ -2066,6 +2075,27 @@ void sdhci_unlock_irqrestore(struct sdhci_host *host, unsigned long flags)
spin_unlock_irqrestore(&host->lock, flags);
}
+static void sdhci_panic_begin(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
+}
+
+static void sdhci_panic_end(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ u32 ier;
+
+ ier = sdhci_readl(host, SDHCI_INT_ENABLE);
+ sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
+}
+
+static const struct mmc_panic_ops sdhci_pops = {
+ .begin = sdhci_panic_begin,
+ .end = sdhci_panic_end,
+};
+
#endif
/*****************************************************************************\
@@ -2854,6 +2884,9 @@ int sdhci_add_host(struct sdhci_host *host)
* Set host parameters.
*/
mmc->ops = &sdhci_ops;
+#ifdef CONFIG_MMC_BLOCK_PANIC_WRITE
+ mmc->pops = &sdhci_pops;
+#endif
mmc->f_max = host->max_clk;
if (host->ops->get_min_clock)
mmc->f_min = host->ops->get_min_clock(host);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
