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4decbbc8a8cf0a69ab011d7c2c88ed3cd0a00ddd
linux/drivers
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Adrian Hunter 4decbbc8a8 i3c: mipi-i3c-hci: Fix race in DMA ring enqueue for parallel xfers 
The I3C subsystem allows multiple transfers to be queued concurrently.
However, the MIPI I3C HCI driver's DMA enqueue path, hci_dma_queue_xfer(),
lacks sufficient serialization.

In particular, the allocation of the enqueue_ptr and its subsequent update
in the RING_OPERATION1 register, must be done atomically.  Otherwise, for
example, it would be possible for 2 transfers to be allocated the same
enqueue_ptr.

Extend the use of the existing spinlock for that purpose.  Keep a count of
the number of xfers enqueued so that it is easy to determine if the ring
has enough space.

Fixes: 9ad9a52cce ("i3c/master: introduce the mipi-i3c-hci driver")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260306072451.11131-6-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2026-03-11 22:10:01 +01:00
..
accel
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
accessibility
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
acpi
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
amba
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
android
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
ata
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
atm
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
auxdisplay
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
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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2026-02-22 08:26:33 -08:00
bluetooth
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
bus
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
cache
…
cdrom
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2026-02-21 17:09:51 -08:00
cdx
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2026-02-21 17:09:51 -08:00
char
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2026-02-21 20:03:00 -08:00
clk
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
clocksource
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2026-02-22 08:26:33 -08:00
comedi
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2026-02-22 08:26:33 -08:00
connector
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2026-02-21 20:03:00 -08:00
counter
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2026-02-21 17:09:51 -08:00
cpufreq
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2026-02-21 20:03:00 -08:00
cpuidle
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2026-02-21 17:09:51 -08:00
crypto
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2026-02-22 08:26:33 -08:00
cxl
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
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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2026-02-21 17:09:51 -08:00
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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2026-02-21 17:09:51 -08:00
edac
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
eisa
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2026-02-21 17:09:51 -08:00
extcon
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
firewire
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2026-02-22 08:26:33 -08:00
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
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
greybus
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2026-02-21 20:03:00 -08:00
hid
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2026-02-22 08:26:33 -08:00
hsi
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hte
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
hv
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
hwmon
i3c: simplify combined i3c/i2c dependencies
2026-02-27 16:33:07 +01:00
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
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
i2c
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2026-02-21 20:03:00 -08:00
i3c
i3c: mipi-i3c-hci: Fix race in DMA ring enqueue for parallel xfers
2026-03-11 22:10:01 +01:00
idle
…
iio
i3c: simplify combined i3c/i2c dependencies
2026-02-27 16:33:07 +01:00
infiniband
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
input
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2026-02-21 17:09:51 -08:00
interconnect
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2026-02-21 17:09:51 -08:00
iommu
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2026-02-22 08:26:33 -08:00
ipack
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2026-02-21 20:03:00 -08:00
irqchip
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2026-02-22 08:26:33 -08:00
isdn
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2026-02-21 20:03:00 -08:00
leds
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2026-02-21 17:09:51 -08:00
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
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
media
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2026-02-22 08:26:33 -08:00
memory
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2026-02-21 17:09:51 -08:00
memstick
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2026-02-22 08:26:33 -08:00
message
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2026-02-22 08:26:33 -08:00
mfd
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2026-02-21 20:03:00 -08:00
misc
i3c: simplify combined i3c/i2c dependencies
2026-02-27 16:33:07 +01:00
mmc
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
most
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2026-02-21 17:09:51 -08:00
mtd
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2026-02-22 08:26:33 -08:00
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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2026-02-21 20:03:00 -08:00
nvme
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2026-02-22 08:26:33 -08:00
nvmem
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2026-02-21 17:09:51 -08:00
of
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2026-02-21 17:09:51 -08:00
opp
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2026-02-21 20:03:00 -08:00
parisc
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2026-02-22 08:26:33 -08:00
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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2026-02-21 17:09:51 -08:00
peci
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2026-02-21 17:09:51 -08:00
perf
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2026-02-21 20:03:00 -08:00
phy
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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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2026-02-21 17:09:51 -08:00
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
2026-02-22 08:26:33 -08:00
pps
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ps3
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2026-02-21 17:09:51 -08:00
ptp
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2026-02-21 17:09:51 -08:00
pwm
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2026-02-21 17:09:51 -08:00
rapidio
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2026-02-21 17:09:51 -08:00
ras
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
regulator
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2026-02-21 20:03:00 -08:00
remoteproc
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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
2026-02-21 17:09:51 -08:00
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
2026-02-22 08:26:33 -08:00
sbus
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scsi
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sh
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siox
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2026-02-21 17:09:51 -08:00
slimbus
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soc
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2026-02-21 20:03:00 -08:00
soundwire
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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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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2026-02-21 17:09:51 -08:00
staging
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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target
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2026-02-21 20:03:00 -08:00
tc
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2026-02-21 17:09:51 -08:00
tee
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
thermal
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
thunderbolt
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2026-02-21 20:03:00 -08:00
tty
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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ufs
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2026-02-21 17:09:51 -08:00
uio
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2026-02-21 17:09:51 -08:00
usb
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
vdpa
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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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
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2026-02-21 20:03:00 -08:00
virt
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
virtio
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
w1
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2026-02-21 17:09:51 -08:00
watchdog
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2026-02-21 17:09:51 -08:00
xen
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
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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