On 06/30/2013 06:42 AM, Georg Gast wrote:
> Hi Tom,
>
> the problem occurs even if i set enable_llm=0. The while loop is now not
> touched and the rpi deadlocks too.
>
> As far as i understand it, the sdhci.c is the base for all sdhci card
> readers and the sdhci-*.c implement the ops for the specific hardware.
>
> My problem is, that i dont have an other sdhci card reader here. It wont
> be possible to boot from, but i could try to read from it on a rt
> kernel. If i compile the sdhci_bcm2708 as a module, i could not get a
> device info from the rpi reader. Maybe an other reader works, then the
> real problem sits in sdhci_bcm2708.c (or at bad luck, it shows an bigger
> problem in sdhci.c).
>
> Georg
>
Here's a quick and dirty hack to get things going.
Regards,
Jeremy
--- linux/drivers/mmc/host/sdhci.c 2013-07-03 11:54:06.306455988 +0200
+++ linux-rt/drivers/mmc/host/sdhci.c 2013-07-03 16:49:33.298601044 +0200
@@ -162,9 +162,17 @@
preempt_schedule();
}
spin_lock_irqsave(&host->lock,*flags);
+#ifdef CONFIG_PREEMPT_RT_FULL
+ disable_irq_nosync(host->irq);
+#else
disable_irq(host->irq);
+#endif
if(host->second_irq)
+#ifdef CONFIG_PREEMPT_RT_FULL
+ disable_irq_nosync(host->second_irq);
+#else
disable_irq(host->second_irq);
+#endif
local_irq_enable();
}
else
@@ -1834,7 +1842,11 @@
host = mmc_priv(mmc);
sdhci_runtime_pm_get(host);
+#ifdef CONFIG_PREEMPT_RT_FULL
+ disable_irq_nosync(host->irq);
+#else
disable_irq(host->irq);
+#endif
spin_lock(&host->lock);
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
@@ -1935,7 +1947,11 @@
wait_event_interruptible_timeout(host->buf_ready_int,
(host->tuning_done == 1),
msecs_to_jiffies(50));
+#ifdef CONFIG_PREEMPT_RT_FULL
+ disable_irq_nosync(host->irq);
+#else
disable_irq(host->irq);
+#endif
spin_lock(&host->lock);
if (!host->tuning_done) {
