| Message ID | 20230510162234.291439-1-hdegoede@redhat.com |
|---|---|
| Headers | show |
| Series | Fix oops about sleeping in led_trigger_blink() | expand |
Hans de Goede <hdegoede@redhat.com> wrote: > led_blink_set[_oneshot]()'s delay_on and delay_off function parameters > are pass by reference, so that hw-blink implementations can report > back the actual achieved delays when the values have been rounded > to something the hw supports. > > This is really only interesting for the sysfs API / the timer trigger. > Other triggers don't really care about this and none of the callers of > led_trigger_blink[_oneshot]() do anything with the returned delay values. > > Change the led_trigger_blink[_oneshot]() delay parameters to pass-by-value, > there are 2 reasons for this: > > 1. led_cdev->blink_set() may sleep, while led_trigger_blink() may not. > So on hw where led_cdev->blink_set() sleeps the call needs to be deferred > to a workqueue, in which case the actual achieved delays are unknown > (this is a preparation patch for the deferring). > > 2. Since the callers don't care about the actual achieved delays, allowing > callers to directly pass a value leads to simpler code for most callers. For netfilter: Acked-by: Florian Westphal <fw@strlen.de>
Hi All, This is a resend with al the subsys maintainers of files touched by the small led_trigger_blink() / led_trigger_blink_oneshot() API/prototype change in the first patch in this series. ARCNet, power-supply, USB, MAC80211 and netfilter maintainers, may we please have your ack for merging patch 1/4 through Lee's LED tree: https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git/ ? Orginal cover letter: Here is a patch series to fix an oops about sleeping in led_trigger_blink() + one other small bugfix. Fixes: 0b9536c95709 ("leds: Add ability to blink via simple trigger") tag, but Fixes tags tend to lead to patches getting automatically added to the stable series and I would prefer to see this series get some significant testing time in mainline first, so I have chosen to omit the tag. Regards, Hans Hans de Goede (4): leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value leds: Fix set_brightness_delayed() race leds: Fix oops about sleeping in led_trigger_blink() leds: Clear LED_INIT_DEFAULT_TRIGGER when clearing current trigger drivers/leds/led-core.c | 81 ++++++++++++++++++++---- drivers/leds/led-triggers.c | 17 ++--- drivers/leds/trigger/ledtrig-disk.c | 9 +-- drivers/leds/trigger/ledtrig-mtd.c | 8 +-- drivers/net/arcnet/arcnet.c | 8 +-- drivers/power/supply/power_supply_leds.c | 5 +- drivers/usb/common/led.c | 4 +- include/linux/leds.h | 43 ++++++++++--- net/mac80211/led.c | 2 +- net/mac80211/led.h | 8 +-- net/netfilter/xt_LED.c | 3 +- 11 files changed, 125 insertions(+), 63 deletions(-)