On 1/11/21 5:14 PM, Dmitry Osipenko wrote:
11.01.2021 16:55, Mikko Perttunen пишет:
Upon a communication error, the interrupt handler can call
tegra_i2c_disable_packet_mode. This causes a sleeping poll to happen
unless the current transaction was marked atomic. Since
11.01.2021 16:55, Mikko Perttunen пишет:
> Upon a communication error, the interrupt handler can call
> tegra_i2c_disable_packet_mode. This causes a sleeping poll to happen
> unless the current transaction was marked atomic. Since
> tegra_i2c_disable_packet_mode is only called from the interrupt
Agreed that this is possibly not optimal, but this patch simply returns
the behavior to what it was before "i2c: tegra: Support atomic
transfers", fixing the overt issue.
Design fixes can be considered later, in a non-stable patch.
Mikko
On 1/11/21 4:31 PM, David Laight wrote:
From: Mikko
From: Mikko Perttunen
> Sent: 11 January 2021 13:56
>
> Upon a communication error, the interrupt handler can call
> tegra_i2c_disable_packet_mode. This causes a sleeping poll to happen
> unless the current transaction was marked atomic. Since
> tegra_i2c_disable_packet_mode is only called from
Upon a communication error, the interrupt handler can call
tegra_i2c_disable_packet_mode. This causes a sleeping poll to happen
unless the current transaction was marked atomic. Since
tegra_i2c_disable_packet_mode is only called from the interrupt path,
make it use atomic waiting always.
Fixes:
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