On Saturday 27 April 2013 01:34 AM, Sourav Poddar wrote:
Hi, This patch series contains fixes around the issue that the console UART should not idled on suspend while using "no_console_suspend" in bootargs. The approach thought of is to modify the serial core/serial driver to bypass runtime PM if the UART in contention is a console and we are using "no_console_suspend" in our bootargs. There were discussions about how to handle "no_idle_on_suspend" issue and all the discussions are as follows: https://lkml.org/lkml/2013/4/5/239 https://lkml.org/lkml/2013/4/2/350 https://lkml.org/lkml/2013/3/18/199 https://lkml.org/lkml/2013/3/18/295 Due to the amount of change in approach, I am posting this as a new series. v4->v5 1. Add comments 2. Formatting. v3->v4 1. check for console in runtime api. v2->v3 1. Use "-EBUSY" for no_console_suspend case 2. Bypass runtime PM only during suspend 3. Improve the commit log based on community suggestion. v1->v2 1. Remove the prepare/complete callback. 2. Adapt runtime PM callback to deal with the issue. 3. Fold patch(1,2) of previous series into 1. 4. Reordered the patch. 5. Change $subject and chage log for few patches. Cc: Santosh Shilimkar<santosh.shilimkar@xxxxxx> Cc: Felipe Balbi<balbi@xxxxxx> Cc: Rajendra nayak<rnayak@xxxxxx> Test info Omap4430sdp: - Tested wakeup from UART after suspend for dt and non dt case. Omap5430evm: - Tested wakeup from UART after suspend for dt case. These patches were the part of the bigger series[1]. Breaking them into two relevant series as they go through the different tree. [1]: http://lkml.org/lkml/2013/4/26/274 This patches are based on 3.9-rc8 The following changes since commit 824282ca7d250bd7c301f221c3cd902ce906d731: Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus (2013-04-22 15:00:59 -0700) are available in the git repository at: git://gitorious.org/linux-connectivity/linux-connectivity.git serial_fix Sourav Poddar (2): driver: tty: serial: Move "uart_console" def to core header file. driver: serial: omap: prevent runtime PM for "no_console_suspend" drivers/tty/serial/mpc52xx_uart.c | 10 ---------- drivers/tty/serial/omap-serial.c | 34 +++++++++++++++++++++++++++++++++- drivers/tty/serial/serial_core.c | 6 ------ include/linux/serial_core.h | 7 +++++++ 4 files changed, 40 insertions(+), 17 deletion
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