serial: 8250_port: Update runtime PM flow
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- v2 Latest2 patches 1 replyIn review
- v12 patches 2 repliesSuperseded
Patches in v2 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | serial: 8250_port: Remove redundant pm_runtime_mark_last_busy() calldrivers/ | +0 | 0 replies | |
| 2/2 | serial: 8250_port: properly handle runtime PM in IRQdrivers/ | +12 | 1 reply |
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Cover letter [PATCH v2 0/2] serial: 8250_port: Update runtime PM flow
There are two changes, one is a straightforward drop of the duplicate runtime PM call (which is idempotent and hence it's harmless to call, but practically no need to do so) and the other addresses long standing problem with potentially sleeping PM calls on some system in IRQ context. Also the latter might lead to unneeded resume-suspend cycle when IRQ is shared and interrupt is not ours. This mini-series to update runtime PM flow to make sure this won't happen.
In v2:
- removed now unused local variable (Greg)
v1: <[email protected]>
Andy Shevchenko (2):
serial: 8250_port: Remove redundant pm_runtime_mark_last_busy() call
serial: 8250_port: properly handle runtime PM in IRQ
drivers/tty/serial/8250/8250_port.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)
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2.50.1