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Groups > linux.kernel > #1332363
| From | Tony Lindgren <tony@atomide.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 0/4] serial: omap: robustify for high speed transfers |
| Date | 2016-02-11 22:10 +0100 |
| Message-ID | <r16EW-5RN-5@gated-at.bofh.it> (permalink) |
| References | <qTH8D-2I1-47@gated-at.bofh.it> <qUUwO-8gR-25@gated-at.bofh.it> <qWkfv-5Sw-3@gated-at.bofh.it> <qXUqB-3w4-1@gated-at.bofh.it> <r0Yeo-8w1-47@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hi, * John Ogness <john.ogness@linutronix.de> [160211 04:04]: > > At these speeds, nearly every DMA interrupt is accompanied by a spurious > UART interrupt. So, sadly, the interrupts are doubled. > > It is on my TODO list to verify if the spurious UART interrupts exactly > match the recently added [0] spurious interrupt detection in omap-intc. If you're seeing spurious interrupts you may want try adding a flush of posted write at the end of the 8250_omap interrupt handler. Basically read back some register from the 8250. This has fixed so far pretty much all the spurious IRQ issues for omaps using the drivers/irqchip/irq-omap-intc.c, meaning omap3 and am335x and ti81xx variants too most likely. Regards, Tony
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Re: [PATCH 0/4] serial: omap: robustify for high speed transfers John Ogness <john.ogness@linutronix.de> - 2016-02-11 13:10 +0100
Re: [PATCH 0/4] serial: omap: robustify for high speed transfers Tony Lindgren <tony@atomide.com> - 2016-02-11 22:10 +0100
Re: [PATCH 0/4] serial: omap: robustify for high speed transfers John Ogness <john.ogness@linutronix.de> - 2016-02-22 16:40 +0100
Re: [PATCH 0/4] serial: omap: robustify for high speed transfers Tony Lindgren <tony@atomide.com> - 2016-02-22 20:40 +0100
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