linux-toradex.git/drivers/mailbox, branch v7.0-rc7

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook

mailbox: sprd: mask interrupts that are not handled

2026-02-02T00:59:52+00:00

To reduce the amount of spurious interrupts, disable the interrupts that
are not handled in this driver.

Signed-off-by: Otto Pflüger 
Signed-off-by: Jassi Brar

mailbox: sprd: add support for mailbox revision 2

2026-02-02T00:59:49+00:00

Newer Unisoc SoCs such as UMS9230 include a new revision of the mailbox
IP with support for up to 16 channels. Since the new revision has a
similar register layout and many parts have remained unchanged, make the
driver support both revisions.

Signed-off-by: Otto Pflüger 
Signed-off-by: Jassi Brar

mailbox: sprd: clear delivery flag before handling TX done

2026-02-02T00:59:33+00:00

If there are any pending messages in the mailbox queue, they are sent
as soon as a TX done event arrives from the driver. This may trigger a
new delivery interrupt while the previous one is still being handled.
If the delivery status is cleared after this, the interrupt is lost.
To prevent this from happening, clear the delivery status immediately
after checking it and before any new messages are sent.

Signed-off-by: Otto Pflüger 
Signed-off-by: Jassi Brar

mailbox: bcm-ferxrm-mailbox: Use default primary handler

2026-02-02T00:48:20+00:00

request_threaded_irq() is invoked with a primary and a secondary handler
and no flags are passed. The primary handler is the same as
irq_default_primary_handler() so there is no need to have an identical
copy.
The lack of the IRQF_ONESHOT can be dangerous because the interrupt
source is not masked while the threaded handler is active. This means,
especially on LEVEL typed interrupt lines, the interrupt can fire again
before the threaded handler had a chance to run.

Use the default primary interrupt handler by specifying NULL and set
IRQF_ONESHOT so the interrupt source is masked until the secondary
handler is done.

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Jassi Brar

mailbox: Remove mailbox_client.h from controller drivers

2026-02-02T00:48:01+00:00

mailbox_client.h should be used by mailbox consumer drivers, not mailbox
controller (provider) drivers. The affected drivers do not use any mailbox
client APIs, so the include can be safely removed.

Signed-off-by: Peng Fan 
Reviewed-by: Sudeep Holla 
Signed-off-by: Jassi Brar

mailbox: zynqmp-ipi: Simplify with scoped for each OF child loop

2026-01-25T00:42:40+00:00

Use scoped for-each loop when iterating over device nodes to make code a
bit simpler.

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Jassi Brar

mailbox: mtk-cmdq: Simplify with scoped for each OF child loop

2026-01-25T00:42:40+00:00

Use scoped for-each loop when iterating over device nodes to make code a
bit simpler.

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Jassi Brar

mailbox: Improve RISCV_SBI_MPXY_MBOX guidance

2026-01-25T00:42:39+00:00

RISC-V SBI Message Proxy (MPXY) Mailbox support defaults to enabled, but
the help text states "If unsure say N".

Recommend enabling this driver, as it is a very critical RISC-V driver
providing mailbox channels to other drivers such as clock, system MSIs,
etc.

Fixes: bf3022a4eb119c6b ("mailbox: Add RISC-V SBI message proxy (MPXY) based mailbox driver")
Suggested-by: Anup Patel 
Signed-off-by: Geert Uytterhoeven 
Reviewed-by: Anup Patel 
Signed-off-by: Jassi Brar

mailbox: mchp-ipc-sbi: fix uninitialized symbol and other smatch warnings

2026-01-25T00:42:39+00:00

Fix uninitialized symbol 'hartid' warning in mchp_ipc_cluster_aggr_isr()
by introducing a 'found' flag to track whether the IRQ matches any
online hart. If no match is found, return IRQ_NONE.

Also fix other smatch warnings by removing dead code in
mchp_ipc_startup() and by returning -ENODEV in dev_err_probe() if the
Microchip SBI extension is not found.

Fixes below smatch warnings:
drivers/mailbox/mailbox-mchp-ipc-sbi.c:187 mchp_ipc_cluster_aggr_isr() error: uninitialized symbol 'hartid'.
drivers/mailbox/mailbox-mchp-ipc-sbi.c:324 mchp_ipc_startup() warn: ignoring unreachable code.
drivers/mailbox/mailbox-mchp-ipc-sbi.c:422 mchp_ipc_probe() warn: passing zero to 'dev_err_probe'

Reported-by: kernel test robot 
Reported-by: Dan Carpenter 
Closes: https://lore.kernel.org/r/202512171533.CDLdScMY-lkp@intel.com/
Signed-off-by: Valentina Fernandez 
Signed-off-by: Jassi Brar