console, serial8250: Disable PM and DMA ops
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b4 am [email protected]Versions newest first
- v1 Latest3 patches 24 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | console: introduce ->exit() callbackinclude/ kernel/ | +4 | 0 replies | |
| 2/3 | serial: 8250_port: Don't use power management for kernel consoledrivers/ drivers/ include/ | +28 | 0 replies | |
| 3/3 | serial: 8250_port: Disable DMA operations for kernel consoledrivers/ | +4 | 3 replies |
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Cover letter [PATCH v1 0/3] console, serial8250: Disable PM and DMA ops
Kernel console is sensitive to any kind of complex work needed to print out anything on it. One such case is emergency print during Oops.
This series proposes to disable runtime PM and DMA operations on 8250 serial console.
More detailed explanation why is provided in patch 2.
The series has been in our internal trees for years already with no problems observed.
Andy Shevchenko (3):
console: introduce ->exit() callback
serial: 8250_port: Don't use power management for kernel console
serial: 8250_port: Disable DMA operations for kernel console
drivers/tty/serial/8250/8250_core.c | 9 +++++++++ drivers/tty/serial/8250/8250_port.c | 27 ++++++++++++++++++++++----- include/linux/console.h | 1 + include/linux/serial_8250.h | 1 + kernel/printk/printk.c | 3 +++ 5 files changed, 36 insertions(+), 5 deletions(-)
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2.17.0