Quoting Ryan Case (2018-11-27 18:37:15)
> On Tue, Nov 27, 2018 at 6:04 PM Stephen Boyd wrote:
> >
> > Quoting Ryan Case (2018-11-27 17:24:44)
> >
> > > I hope underflow is impossible as well. However, if the hardware did
> > > wind up in a strange state I wanted to err on the side of not throwing
On Tue, Nov 27, 2018 at 6:04 PM Stephen Boyd wrote:
>
> Quoting Ryan Case (2018-11-27 17:24:44)
> > On Tue, Nov 27, 2018 at 4:20 PM Stephen Boyd wrote:
> > >
> > > Quoting Ryan Case (2018-11-26 18:25:36)
> > > > Transfers were being divided into device FIFO sized (64 byte max)
> > > > operations
Quoting Ryan Case (2018-11-27 17:24:44)
> On Tue, Nov 27, 2018 at 4:20 PM Stephen Boyd wrote:
> >
> > Quoting Ryan Case (2018-11-26 18:25:36)
> > > Transfers were being divided into device FIFO sized (64 byte max)
> > > operations which would poll for completion within a spin_lock_irqsave /
> > >
On Tue, Nov 27, 2018 at 4:20 PM Stephen Boyd wrote:
>
> Quoting Ryan Case (2018-11-26 18:25:36)
> > Transfers were being divided into device FIFO sized (64 byte max)
> > operations which would poll for completion within a spin_lock_irqsave /
> > spin_unlock_irqrestore block. This both made things
Quoting Ryan Case (2018-11-26 18:25:36)
> Transfers were being divided into device FIFO sized (64 byte max)
> operations which would poll for completion within a spin_lock_irqsave /
> spin_unlock_irqrestore block. This both made things slow by waiting for
> the FIFO to completely drain before addin
] tty: serial: qcom_geni_serial: Fix softlock
CC: kbuild-...@01.org
In-Reply-To: <20181127022536.104663-1-ryandc...@chromium.org>
References: <20181127022536.104663-1-ryandc...@chromium.org>
TO: Ryan Case
CC: Greg Kroah-Hartman , Jiri Slaby
, Evan Green , Doug Anderson
,
Transfers were being divided into device FIFO sized (64 byte max)
operations which would poll for completion within a spin_lock_irqsave /
spin_unlock_irqrestore block. This both made things slow by waiting for
the FIFO to completely drain before adding further data and would also
result in softlock
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