Re: [PATCH] tty: serial: sc16is7xx: use threaded interrupts instead of homegrow

On Fri, Feb 26, 2016 at 01:26:27PM -0500, Kuba Kicinski wrote:

On 26 February 2016 11:52:28 GMT-05:00, Josh Cartwright [off-list ref] wrote:

[..]

quoted

Instead, the driver needs to implement it's own oneshot-like
handling at the device-level: in the registered irq handler, capture
triggered interrupt state, squelch/mask, and enqueue the
kthread_work.  In the tail-end of the kthread_work, re-enable
interrupts at the device level.

The problem there being IIRC that i2c doesn't provide async writes so
we can't mask from irq callback. The only option would be
disable_irq/enable_irq, right?

Ah, yes, that is a problem.  If by disable_irq(), you mean
disable_irq_nosync(), then yes, I think that'd work.

  Josh