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f0b5159637ca0b8feaaa95de0f5ea38f1ba26729
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Adrian Hunter f0b5159637 i3c: mipi-i3c-hci: Fix race between DMA ring dequeue and interrupt handler 
The DMA ring bookkeeping in the MIPI I3C HCI driver is updated from two
contexts: the DMA ring dequeue path (hci_dma_dequeue_xfer()) and the
interrupt handler (hci_dma_xfer_done()).  Both modify the ring's
in-flight transfer state - specifically rh->src_xfers[] and
xfer->ring_entry - but without any serialization.  This allows the two
paths to race, potentially leading to inconsistent ring state.

Serialize access to the shared ring state by extending the existing
spinlock to cover the DMA dequeue path and the entire interrupt handler.
Since the core IRQ handler now holds this lock, remove the per-function
locking from the PIO and DMA sub-handlers.

Additionally, clear the completed entry in rh->src_xfers[] in
hci_dma_xfer_done() so it cannot be matched or completed again.

Finally, place the ring restart sequence under the same lock in
hci_dma_dequeue_xfer() to avoid concurrent enqueue or completion
operations while the ring state is being modified.

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/20260306072451.11131-8-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
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acpi
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2026-02-22 08:26:33 -08:00
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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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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block
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bluetooth
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bus
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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
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2026-02-22 08:26:33 -08:00
clocksource
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comedi
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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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cpuidle
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2026-02-21 17:09:51 -08:00
crypto
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cxl
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2026-02-21 17:09:51 -08:00
dax
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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
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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
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2026-02-22 08:26:33 -08:00
eisa
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2026-02-21 17:09:51 -08:00
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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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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hsi
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hte
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2026-02-21 17:09:51 -08:00
hv
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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 between DMA ring dequeue and interrupt handler
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
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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
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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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2026-02-21 17:09:51 -08:00
net
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2026-02-22 08:26:33 -08:00
nfc
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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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nvmem
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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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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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pnp
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2026-02-21 17:09:51 -08:00
power
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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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2026-02-21 17:09:51 -08:00
rapidio
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2026-02-21 17:09:51 -08:00
ras
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2026-02-21 17:09:51 -08:00
regulator
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remoteproc
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2026-02-21 17:09:51 -08:00
resctrl
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reset
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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
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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
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spi
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spmi
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ssb
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staging
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target
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tc
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tee
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thermal
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thunderbolt
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2026-02-21 20:03:00 -08:00
tty
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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
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vdpa
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vfio
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2026-02-21 20:03:00 -08:00
vhost
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video
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2026-02-21 20:03:00 -08:00
virt
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2026-02-22 08:26:33 -08:00
virtio
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2026-02-21 20:03:00 -08:00
w1
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watchdog
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2026-02-21 17:09:51 -08:00
xen
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zorro
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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