BMC/Intel-BMC/linux.git/kernel/irq/autoprobe.c, branch v4.13

genirq: Add force argument to irq_startup()

2017-06-22T16:21:24+00:00

In order to handle managed interrupts gracefully on irq_startup() so they won't lose their assigned affinity, it's necessary to allow startups which keep the interrupts in managed shutdown state, if none of the assigend CPUs is online. This allows drivers to request interrupts w/o the CPUs being online, which avoid online/offline churn in drivers. Add a force argument which can override that decision and let only request_irq() and enable_irq() allow the managed shutdown handling. enable_irq() is required, because the interrupt might be requested with IRQF_NOAUTOEN and enable_irq() invokes irq_startup() which would then wreckage the assignment again. All other callers force startup and potentially break the assigned affinity. No functional change as this only adds the function argument. Signed-off-by: Thomas Gleixner Cc: Jens Axboe Cc: Marc Zyngier Cc: Michael Ellerman Cc: Keith Busch Cc: Peter Zijlstra Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/20170619235447.112094565@linutronix.de

genirq: Handle pending irqs in irq_startup()

2012-02-15T10:56:59+00:00

An interrupt might be pending when irq_startup() is called, but the startup code does not invoke the resend logic. In some cases this prevents the device from issuing another interrupt which renders the device non functional. Call the resend function in irq_startup() to keep things going. Reported-and-tested-by: Russell King Cc: stable@vger.kernel.org Signed-off-by: Thomas Gleixner

genirq: Remove compat code

2011-03-29T12:48:19+00:00

Signed-off-by: Thomas Gleixner

genirq: Remove real old transition functions

2011-02-19T11:58:23+00:00

These transition helpers are stale for years now. Remove them. Signed-off-by: Thomas Gleixner

genirq: Wrap the remaning IRQ_* flags

2011-02-19T11:58:21+00:00

Use wrappers to keep them away from the core code. Signed-off-by: Thomas Gleixner

genirq: Move IRQ_PENDING flag to core

2011-02-19T11:58:17+00:00

Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner

genirq: Move IRQ_REPLAY and IRQ_WAITING to core

2011-02-19T11:58:16+00:00

No users outside of core. Signed-off-by: Thomas Gleixner

genirq: Move IRQ_AUTODETECT to internal state

2011-02-19T11:58:15+00:00

No users outside of core Signed-off-by: Thomas Gleixner

genirq: Consolidate startup/shutdown of interrupts

2011-02-19T11:58:10+00:00

Aside of duplicated code some of the startup/shutdown sites do not handle the MASKED/DISABLED flags and the depth field at all. Move that to a helper function and take care of it there. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra LKML-Reference: <20110202212551.787481468@linutronix.de>

genirq: Provide compat handling for chip->set_type()

2010-10-04T10:43:47+00:00

Wrap the old chip function set_type() until the migration is complete and the old chip functions are removed. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra LKML-Reference: <20100927121842.832261548@linutronix.de> Reviewed-by: H. Peter Anvin Reviewed-by: Ingo Molnar