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sched,spi: Convert to sched_set_fifo*()

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Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

No effective change.

Cc: broonie@kernel.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
This commit is contained in:
Peter Zijlstra 2020-04-21 12:09:13 +02:00
parent f8ec806be1
commit 3070da3340
2 changed files with 2 additions and 8 deletions
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6
drivers/platform/chrome/cros_ec_spi.c
View File

@ -709,9 +709,6 @@ static void cros_ec_spi_high_pri_release(void *worker)
static int cros_ec_spi_devm_high_pri_alloc(struct device *dev, static int cros_ec_spi_devm_high_pri_alloc(struct device *dev,
struct cros_ec_spi *ec_spi) struct cros_ec_spi *ec_spi)
{ {
struct sched_param sched_priority = {
.sched_priority = MAX_RT_PRIO / 2,
};
int err; int err;
ec_spi->high_pri_worker = ec_spi->high_pri_worker =
@ -728,8 +725,7 @@ static int cros_ec_spi_devm_high_pri_alloc(struct device *dev,
if (err) if (err)
return err; return err;
err = sched_setscheduler_nocheck(ec_spi->high_pri_worker->task, err = sched_set_fifo(ec_spi->high_pri_worker->task);
SCHED_FIFO, &sched_priority);
if (err) if (err)
dev_err(dev, "Can't set cros_ec high pri priority: %d\n", err); dev_err(dev, "Can't set cros_ec high pri priority: %d\n", err);
return err; return err;

4
drivers/spi/spi.c
View File

@ -1592,11 +1592,9 @@ EXPORT_SYMBOL_GPL(spi_take_timestamp_post);
*/ */
static void spi_set_thread_rt(struct spi_controller *ctlr) static void spi_set_thread_rt(struct spi_controller *ctlr)
{ {
struct sched_param param = { .sched_priority = MAX_RT_PRIO / 2 };
dev_info(&ctlr->dev, dev_info(&ctlr->dev,
"will run message pump with realtime priority\n"); "will run message pump with realtime priority\n");
sched_setscheduler(ctlr->kworker_task, SCHED_FIFO, &param); sched_set_fifo(ctlr->kworker_task);
} }
static int spi_init_queue(struct spi_controller *ctlr) static int spi_init_queue(struct spi_controller *ctlr)