linux_dsm_epyc7002/drivers/mmc/core
Ulf Hansson 36d57efb4a mmc: core: Clarify sdio_irq_pending flag for MMC_CAP2_SDIO_IRQ_NOTHREAD
The sdio_irq_pending flag is used to let host drivers indicate that it has
signaled an IRQ. If that is the case and we only have a single SDIO func
that have claimed an SDIO IRQ, our assumption is that we can avoid reading
the SDIO_CCCR_INTx register and just call the SDIO func irq handler
immediately. This makes sense, but the flag is set/cleared in a somewhat
messy order, let's fix that up according to below.

First, the flag is currently set in sdio_run_irqs(), which is executed as a
work that was scheduled from sdio_signal_irq(). To make it more implicit
that the host have signaled an IRQ, let's instead immediately set the flag
in sdio_signal_irq(). This also makes the behavior consistent with host
drivers that uses the legacy, mmc_signal_sdio_irq() API. This have no
functional impact, because we don't expect host drivers to call
sdio_signal_irq() until after the work (sdio_run_irqs()) have been executed
anyways.

Second, currently we never clears the flag when using the sdio_run_irqs()
work, but only when using the sdio_irq_thread(). Let make the behavior
consistent, by moving the flag to be cleared inside the common
process_sdio_pending_irqs() function. Additionally, tweak the behavior of
the flag slightly, by avoiding to clear it unless we processed the SDIO
IRQ. The purpose with this at this point, is to keep the information about
whether there have been an SDIO IRQ signaled by the host, so at system
resume we can decide to process it without reading the SDIO_CCCR_INTx
register.

Tested-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-09-11 16:10:18 +02:00
..
block.c Merge branch 'fixes' into next 2019-02-28 09:16:18 +01:00
block.h mmc: block: Remove code no longer needed after the switch to blk-mq 2017-12-11 13:02:22 +01:00
bus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bus.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
card.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
core.c SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
debugfs.c MMC core: 2019-07-11 18:11:21 -07:00
host.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
host.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile mmc: core: Move regulator helpers to separate file 2019-02-25 15:20:58 +01:00
mmc_ops.c Revert "mmc: core: do not retry CMD6 in __mmc_switch()" 2019-09-03 16:53:28 +02:00
mmc_ops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mmc_test.c mmc: core: no need to check return value of debugfs_create functions 2019-06-17 13:30:49 +02:00
mmc.c SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
pwrseq_emmc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pwrseq_sd8787.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
pwrseq_simple.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pwrseq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
pwrseq.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
queue.c mmc: mmc_spi: Enable stable writes 2019-07-22 15:31:00 +02:00
queue.h mmc: stop abusing the request queue_lock pointer 2018-11-17 07:20:45 -07:00
quirks.h treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
regulator.c mmc: core: Convert mmc_regulator_get_ocrmask() to static 2019-02-25 15:20:58 +01:00
sd_ops.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sd_ops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sd.c mmc: core: Fix init of SD cards reporting an invalid VDD range 2019-08-30 09:17:53 +02:00
sd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sdio_bus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_bus.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_cis.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_cis.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_io.c mmc: core: Add sdio_retune_hold_now() and sdio_retune_release() 2019-06-18 13:30:32 +02:00
sdio_irq.c mmc: core: Clarify sdio_irq_pending flag for MMC_CAP2_SDIO_IRQ_NOTHREAD 2019-09-11 16:10:18 +02:00
sdio_ops.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_ops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio_uart.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sdio.c mmc: sdio: Drop unused in-parameter from mmc_sdio_init_card() 2019-07-10 13:20:17 +02:00
slot-gpio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
slot-gpio.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00