Aswath Govindraju 572a7d15f2 spi: omap2-mcspi: Improve performance waiting for CHSTAT ... [ Upstream commit 7b1d968133 ] This reverts commit 13d515c796 (spi: omap2-mcspi: Switch to readl_poll_timeout()). The amount of time spent polling for the MCSPI_CHSTAT bits to be set on AM335x-icev2 platform is less than 1us (about 0.6us) in most cases, with or without using DMA. So, in most cases the function need not sleep. Also, setting the sleep_usecs to zero would not be optimal here because ktime_add_us() used in readl_poll_timeout() is slower compared to the direct addition used after the revert. So, it is sub-optimal to use readl_poll_timeout in this case. When DMA is not enabled, this revert results in an increase of about 27% in throughput and decrease of about 20% in CPU usage. However, the CPU usage and throughput are almost the same when used with DMA. Therefore, fix this by reverting the commit which switched to using readl_poll_timeout(). Fixes: 13d515c796 ("spi: omap2-mcspi: Switch to readl_poll_timeout()") Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> Link: https://lore.kernel.org/r/20200910122624.8769-1-a-govindraju@ti.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-10-29 09:57:41 +01:00
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accessibility	…
acpi	ACPI: Always build evged in	2020-10-17 10:11:22 +02:00
amba	…
android	binder: Remove bogus warning on failed same-process transaction	2020-10-29 09:57:37 +01:00
ata	ata: sata_mv, avoid trigerrable BUG_ON	2020-10-01 13:18:26 +02:00
atm	atm: eni: fix the missed pci_disable_device() for eni_init_one()	2020-10-01 13:18:17 +02:00
auxdisplay	…
base	driver core: Fix probe_count imbalance in really_probe()	2020-10-14 10:32:59 +02:00
bcma	…
block	rbd: require global CAP_SYS_ADMIN for mapping and unmapping	2020-09-17 13:47:53 +02:00
bluetooth	Bluetooth: hci_uart: Cancel init work before unregistering	2020-10-29 09:57:35 +01:00
bus	bus: hisi_lpc: Fixup IO ports addresses to avoid use-after-free in host removal	2020-10-01 13:17:37 +02:00
cdrom	…
char	ipmi:bt-bmc: Fix error handling and status check	2020-10-01 13:18:01 +02:00
clk	clk: samsung: exynos4: mark 'chipid' clock as CLK_IGNORE_UNUSED	2020-10-07 08:01:28 +02:00
clocksource	clocksource/drivers/timer-gx6605s: Fixup counter reload	2020-10-07 08:01:25 +02:00
connector	…
counter	counter: 104-quad-8: Add lock guards - generic interface	2020-05-02 08:48:44 +02:00
cpufreq	cpufreq: armada-37xx: Add missing MODULE_DEVICE_TABLE	2020-10-29 09:57:40 +01:00
cpuidle	cpuidle: Fixup IRQ state	2020-09-09 19:12:21 +02:00
crypto	cypto: mediatek - fix leaks in mtk_desc_ring_alloc	2020-10-29 09:57:33 +01:00
dax	dax: Fix alloc_dax_region() compile warning	2020-10-01 13:17:15 +02:00
dca	…
devfreq	PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out	2020-10-01 13:17:14 +02:00
dio	…
dma	dmaengine: tegra-apb: Prevent race conditions on channel's freeing	2020-10-01 13:17:36 +02:00
dma-buf	dmabuf: fix NULL pointer dereference in dma_buf_release()	2020-10-01 13:18:24 +02:00
edac	EDAC/ti: Fix handling of platform_get_irq() error	2020-10-29 09:57:29 +01:00
eisa	…
extcon	extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()'	2020-06-24 17:50:36 +02:00
firewire	…
firmware	firmware: arm_sdei: Use cpus_read_lock() to avoid races with cpuhp	2020-10-01 13:17:37 +02:00
fpga	fpga: dfl: fix bug in port reset handshake	2020-07-29 10:18:31 +02:00
fsi	…
gnss	gnss: sirf: fix error return code in sirf_probe()	2020-06-22 09:31:20 +02:00
gpio	gpio: aspeed: fix ast2600 bank properties	2020-10-07 08:01:29 +02:00
gpu	drm: mxsfb: check framebuffer pitch	2020-10-29 09:57:40 +01:00
greybus	…
hid	HID: roccat: add bounds checking in kone_sysfs_write_settings()	2020-10-29 09:57:39 +01:00
hsi	…
hv	Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload	2020-09-23 12:40:40 +02:00
hwmon	hwmon: (pmbus/max34440) Fix status register reads for MAX344{51,60,61}	2020-10-29 09:57:32 +01:00
hwspinlock	…
hwtracing	coresight: etm4x: Handle unreachable sink in perf mode	2020-10-29 09:57:40 +01:00
i2c	i2c: owl: Clear NACK and BUS error bits	2020-10-14 10:33:01 +02:00
i3c	…
ide	ide: serverworks: potential overflow in svwks_set_pio_mode()	2020-02-24 08:36:53 +01:00
idle	…
iio	iio: adc: qcom-spmi-adc5: fix driver name	2020-10-07 08:01:25 +02:00
infiniband	IB/iser: Always check sig MR before putting it to the free pool	2020-10-01 13:17:50 +02:00
input	Input: ati_remote2 - add missing newlines when printing module parameters	2020-10-14 10:33:06 +02:00
interconnect	…
iommu	iommu/vt-d: Fix lockdep splat in iommu_flush_dev_iotlb()	2020-10-14 10:33:02 +02:00
ipack	ipack: tpci200: fix error return code in tpci200_register()	2020-05-27 17:46:47 +02:00
irqchip	irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake	2020-09-03 11:27:06 +02:00
isdn	…
leds	leds: mlxreg: Fix possible buffer overflow	2020-10-01 13:17:14 +02:00
lightnvm	…
macintosh	macintosh/via-macii: Access autopoll_devs when inside lock	2020-08-19 08:16:15 +02:00
mailbox	mailbox: zynqmp-ipi: Fix NULL vs IS_ERR() check in zynqmp_ipi_mbox_probe()	2020-06-24 17:50:36 +02:00
mcb	…
md	dm: fix bio splitting and its bio completion order for regular IO	2020-10-01 13:18:25 +02:00
media	media: ti-vpe: Fix a missing check and reference count leak	2020-10-29 09:57:34 +01:00
memory	…
memstick	memstick: Skip allocating card when removing host	2020-10-07 08:01:25 +02:00
message	scsi: mptscsih: Fix read sense data size	2020-07-16 08:16:36 +02:00
mfd	mfd: mfd-core: Protect against NULL call-back function pointer	2020-10-01 13:17:17 +02:00
misc	VMCI: check return value of get_user_pages_fast() for errors	2020-10-29 09:57:37 +01:00
mmc	mmc: core: don't set limits.discard_granularity as 0	2020-10-14 10:33:05 +02:00
mtd	ubi: fastmap: Free unused fastmap anchor peb during detach	2020-10-01 13:18:11 +02:00
mux	…
net	net: dsa: rtl8366rb: Support all 4096 VLANs	2020-10-29 09:57:41 +01:00
nfc	NFC: st95hf: Fix memleak in st95hf_in_send_cmd	2020-09-17 13:47:45 +02:00
ntb	NTB: perf: Fix race condition when run with ntb_test	2020-06-24 17:50:41 +02:00
nubus	…
nvdimm	libnvdimm/security: ensure sysfs poll thread woke up and fetch updated attr	2020-08-21 13:05:35 +02:00
nvme	nvme-pci: disable the write zeros command for Intel 600P/P3100	2020-10-29 09:57:25 +01:00
nvmem	nvmem: qfprom: remove incorrect write support	2020-06-10 20:24:57 +02:00
of	of: of_mdio: Correct loop scanning logic	2020-07-22 09:32:55 +02:00
opp	opp: Increase parsed_static_opps in _of_add_opp_table_v1()	2020-10-01 13:18:11 +02:00
oprofile	…
parisc	parisc: mask out enable and reserved bits from sba imask	2020-08-19 08:16:26 +02:00
parport	…
pci	PCI: tegra: Fix runtime PM imbalance on error	2020-10-01 13:18:07 +02:00
pcmcia	…
perf	drivers/perf: thunderx2_pmu: Fix memory resource error handling	2020-10-29 09:57:30 +01:00
phy	phy: ti: am654: Fix a leak in serdes_am654_probe()	2020-10-07 08:01:28 +02:00
pinctrl	pinctrl: mcp23s08: Fix mcp23x17 precious range	2020-10-29 09:57:39 +01:00
platform	platform/x86: fix kconfig dependency warning for FUJITSU_LAPTOP	2020-10-14 10:33:03 +02:00
pnp	…
power	power: supply: max17040: Correct voltage reading	2020-10-01 13:17:59 +02:00
powercap	…
pps	…
ps3	…
ptp	…
pwm	pwm: lpss: Add range limit check for the base_unit register value	2020-10-29 09:57:38 +01:00
rapidio	rapidio: avoid data race between file operation callbacks and mport_cdev_add().	2020-10-01 13:18:08 +02:00
ras	…
regulator	regulator: resolve supply after creating regulator	2020-10-29 09:57:34 +01:00
remoteproc	remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load	2020-08-21 13:05:29 +02:00
reset	reset: uniphier: Add SCSSI reset control for each channel	2020-02-24 08:36:41 +01:00
rpmsg	…
rtc	rtc: ds1374: fix possible race condition	2020-10-01 13:17:43 +02:00
s390	s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl	2020-10-01 13:18:24 +02:00
sbus	…
scsi	scsi: mpt3sas: Fix sync irqs	2020-10-29 09:57:39 +01:00
sfi	…
sh	…
siox	…
slimbus	slimbus: core: Fix mismatch in of_node_get/put	2020-07-22 09:33:08 +02:00
soc	soc: qcom: rpmh-rsc: Set suppress_bind_attrs flag	2020-08-19 08:15:59 +02:00
soundwire	soundwire: bus: disable pm_runtime in sdw_slave_delete	2020-10-01 13:17:36 +02:00
spi	spi: omap2-mcspi: Improve performance waiting for CHSTAT	2020-10-29 09:57:41 +01:00
spmi	spmi: pmic-arb: Set lockdep class for hierarchical irq domains	2020-02-19 19:53:07 +01:00
ssb	…
staging	net: wilc1000: clean up resource in error path of init mon interface	2020-10-29 09:57:40 +01:00
target	scsi: target: iscsi: Fix hang in iscsit_access_np() when getting tpg->np_login_sem	2020-09-17 13:47:53 +02:00
tc	…
tee	…
thermal	thermal: rcar_thermal: Handle probe error gracefully	2020-10-01 13:17:44 +02:00
thunderbolt	thunderbolt: Prevent crash if non-active NVMem file is read	2020-02-28 17:22:13 +01:00
tty	pty: do tty_flip_buffer_push without port->lock in pty_write	2020-10-29 09:57:38 +01:00
uio	uio_pdrv_genirq: fix use without device tree and no interrupt	2020-07-22 09:33:13 +02:00
usb	xhci: don't create endpoint debugfs entry before ring buffer is set.	2020-10-29 09:57:40 +01:00
vfio	vfio/pci: fix racy on error and request eventfd ctx	2020-10-01 13:18:10 +02:00
vhost	vhost: Use vhost_get_used_size() in vhost_vring_set_addr()	2020-10-14 10:32:58 +02:00
video	video: fbdev: radeon: Fix memleak in radeonfb_pci_register	2020-10-29 09:57:38 +01:00
virt	drivers/virt/fsl_hypervisor: Fix error handling path	2020-10-29 09:57:38 +01:00
virtio	virtio_ring: Avoid loop when vq is broken in virtqueue_poll	2020-08-26 10:40:57 +02:00
visorbus	visorbus: fix uninitialized variable access	2020-02-24 08:36:47 +01:00
vlynq	…
vme	vme: bridges: reduce stack usage	2020-02-24 08:36:48 +01:00
w1	w1: omap-hdq: cleanup to add missing newline for some dev_dbg	2020-06-22 09:31:26 +02:00
watchdog	watchdog: initialize device before misc_register	2020-08-21 13:05:36 +02:00
xen	xen/events: don't use chip_data for legacy IRQs	2020-10-17 10:11:24 +02:00
zorro	…
Kconfig	…
Makefile	…