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Richard Fitzgerald fee12f3c20 soundwire: stream: Poll for DP prepare to avoid interrupt deadlock 
Replace the wait_for_completion_timeout() in sdw_prep_deprep_slave_ports()
with a read_poll_timeout().

The original intent of the wait_for_completion_timeout() was to wait for
the port prepare interrupt. But at this time the code is holding the
bus_lock, which prevents the interrupt handler from running. Because of
this, the port_prep completion will not be signaled and the
wait_for_completion_timeout() will always timeout.

Rewriting the code to avoid taking the bus_lock carries risks, and
needs careful consideration of the consequences. It is safer and simpler
to replace the completion with a simple register poll.

As the code is holding the bus_lock, it is already blocking other activity
so consuming control channel bandwidth for polling isn't really a concern.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20260227111648.175548-1-rf@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2026-03-09 08:02:38 +01:00
..
accel
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accessibility
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
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acpi
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amba
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2026-02-21 17:09:51 -08:00
android
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2026-02-22 08:26:33 -08:00
ata
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2026-02-21 20:03:00 -08:00
atm
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2026-02-22 08:26:33 -08:00
auxdisplay
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base
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2026-02-22 08:26:33 -08:00
bcma
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2026-02-21 17:09:51 -08:00
block
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bluetooth
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bus
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2026-02-22 08:26:33 -08:00
cache
…
cdrom
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cdx
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char
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2026-02-21 20:03:00 -08:00
clk
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clocksource
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comedi
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connector
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counter
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cpufreq
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cpuidle
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crypto
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cxl
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2026-02-21 17:09:51 -08:00
dax
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
dca
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
devfreq
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
dibs
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dio
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2026-02-21 17:09:51 -08:00
dma
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2026-02-21 20:03:00 -08:00
dma-buf
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2026-02-21 20:03:00 -08:00
dpll
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edac
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eisa
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extcon
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firewire
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firmware
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2026-02-21 20:03:00 -08:00
fpga
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2026-02-21 20:03:00 -08:00
fsi
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2026-02-21 17:09:51 -08:00
fwctl
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2026-02-21 17:09:51 -08:00
gnss
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2026-02-21 17:09:51 -08:00
gpib
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2026-02-21 20:03:00 -08:00
gpio
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2026-02-21 20:03:00 -08:00
gpu
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greybus
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hid
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hsi
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hte
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
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hv
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hwmon
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2026-02-22 08:26:33 -08:00
hwspinlock
Merge tag 'soc-drivers-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2026-02-10 20:45:30 -08:00
hwtracing
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2026-02-21 20:03:00 -08:00
i2c
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2026-02-21 20:03:00 -08:00
i3c
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2026-02-21 20:03:00 -08:00
idle
intel_idle: Add C-states validation
2026-01-07 21:17:43 +01:00
iio
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2026-02-22 08:26:33 -08:00
infiniband
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input
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interconnect
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2026-02-21 17:09:51 -08:00
iommu
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ipack
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2026-02-21 20:03:00 -08:00
irqchip
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isdn
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leds
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macintosh
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2026-02-21 20:03:00 -08:00
mailbox
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
mcb
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
md
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media
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memory
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memstick
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message
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mfd
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2026-02-21 20:03:00 -08:00
misc
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2026-02-21 20:03:00 -08:00
mmc
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most
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2026-02-21 17:09:51 -08:00
mtd
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mux
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net
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2026-02-22 08:26:33 -08:00
nfc
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ntb
Merge tag 'kmalloc_obj-treewide-v7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2026-02-21 11:02:58 -08:00
nubus
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
nvdimm
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nvme
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nvmem
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of
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opp
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2026-02-21 20:03:00 -08:00
parisc
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parport
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2026-02-21 17:09:51 -08:00
pci
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2026-02-21 20:03:00 -08:00
pcmcia
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peci
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perf
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2026-02-21 20:03:00 -08:00
phy
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
pinctrl
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2026-02-21 20:03:00 -08:00
platform
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pmdomain
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pnp
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2026-02-21 17:09:51 -08:00
power
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
powercap
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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pps
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ps3
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ptp
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2026-02-21 17:09:51 -08:00
pwm
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rapidio
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ras
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regulator
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2026-02-21 20:03:00 -08:00
remoteproc
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
resctrl
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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reset
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
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rpmsg
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2026-02-21 17:09:51 -08:00
rtc
Merge tag 'rtc-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
2026-02-22 09:43:11 -08:00
s390
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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sbus
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
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scsi
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sh
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siox
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slimbus
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2026-02-21 17:09:51 -08:00
soc
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2026-02-21 20:03:00 -08:00
soundwire
soundwire: stream: Poll for DP prepare to avoid interrupt deadlock
2026-03-09 08:02:38 +01:00
spi
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
spmi
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ssb
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staging
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target
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tc
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
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tee
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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thermal
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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thunderbolt
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tty
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ufs
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uio
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usb
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vdpa
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vfio
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2026-02-21 20:03:00 -08:00
vhost
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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video
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
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virt
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virtio
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w1
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watchdog
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xen
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zorro
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
Kconfig
…
Makefile
phy: enter drivers/phy/Makefile even without CONFIG_GENERIC_PHY
2026-02-04 20:45:26 +05:30