hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

staging: unisys: visorbus: add comment to explain polling logic in controlvm_periodic_work 

Added a comment to explain polling frequency variation logic in
controlvm_periodic_logic() in visorchipset.c.

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sameer Wadgaonkar 2017-05-19 16:17:58 -04:00 committed by Greg Kroah-Hartman
parent 172f4c367c
commit d36c4857cb
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/staging/unisys/visorbus/visorchipset.c
View File

@ -1787,6 +1787,11 @@ controlvm_periodic_work(struct work_struct *work)
/* parahotplug_worker */
parahotplug_process_list();
/*
* The controlvm messages are sent in a bulk. If we start receiving messages, we
* want the polling to be fast. If we do not receive any message for
* MIN_IDLE_SECONDS, we can slow down the polling.
*/
schedule_out:
if (time_after(jiffies, chipset_dev->most_recent_message_jiffies +
(HZ * MIN_IDLE_SECONDS))) {