From: m-karicheri2@ti.com (Murali Karicheri)
To: linux-arm-kernel@lists.infradead.org
Subject: RT-Preempt patched kernel - DaVinci SPI driver IRQ handler not getting called
Date: Wed, 19 Dec 2012 18:06:43 -0500 [thread overview]
Message-ID: <50D24883.9010509@ti.com> (raw)
Hello,
We have applied the RT-Preempt patch on top of the 3.6.6 Linux kernel
and getting an issue with DaVinci SPI driver. During the probing of SPI
NOR flash driver, the flash driver (slave) sends a command and the
response is not received by the spi interrupt handler. The IRQ is
delivered to the interrupt controller driver and is finally delivered to
the irq_thread (called irq_wakeup_process()), but the thread doesn't
seem to wake up and hence the irq is not delivered to the driver
handler. When I add a flag IRQF_NO_THREAD to the irq flags as part of
request_irq(), the driver handler is getting called. DId someone see
similar behavior on any DaVinci or any other ARM platform? Any
suggestions as to how to debug this?
Thanks
Murali Karicheri
reply other threads:[~2012-12-19 23:06 UTC|newest]
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