linux/drivers/i3c, branch master

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00Z

This converts some of the visually simpler cases that have been split over multiple lines. I only did the ones that are easy to verify the resulting diff by having just that final GFP_KERNEL argument on the next line. Somebody should probably do a proper coccinelle script for this, but for me the trivial script actually resulted in an assertion failure in the middle of the script. I probably had made it a bit _too_ trivial. So after fighting that far a while I decided to just do some of the syntactically simpler cases with variations of the previous 'sed' scripts. The more syntactically complex multi-line cases would mostly really want whitespace cleanup anyway. Signed-off-by: Linus Torvalds

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51Z

This is the exact same thing as the 'alloc_obj()' version, only much smaller because there are a lot fewer users of the *alloc_flex() interface. As with alloc_obj() version, this was done entirely with mindless brute force, using the same script, except using 'flex' in the pattern rather than 'objs*'. Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51Z

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28Z

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

i3c: dw-i3c-master: fix SIR reject bit mapping for dynamic addresses

2026-01-30T23:05:22Z

The IBI_SIR_REQ_REJECT register is a 32-bit bitmap indexed by the dynamic address of each I3C slave. The DesignWare controller derives the bit index by folding the 7-bit dynamic address into a 5-bit value, using the sum of the lower 5 bits and the upper 2 bits, modulo 32. The current implementation incorrectly uses the device table index when updating the SIR reject mask, which can result in rejecting or accepting IBIs for the wrong device. Compute the SIR reject bit index directly from the dynamic address, as defined by the controller specification, and use it consistently when updating the reject mask. Signed-off-by: Adrian Ng Ho Yin Reviewed-by: Frank Li Link: https://patch.msgid.link/d4ad8161e604156c60327060ad3d339ebf18fe4f.1769479330.git.adrianhoyin.ng@altera.com Signed-off-by: Alexandre Belloni

i3c: dw-i3c-master: convert spinlock usage to scoped guards

2026-01-30T23:05:22Z

Convert dw-i3c-master to use scoped spinlock guards in place of open-coded spin_lock_irqsave()/spin_unlock_irqrestore() pairs to ensure locks are always safely released on scope exit. Signed-off-by: Adrian Ng Ho Yin Reviewed-by: Frank Li Link: https://patch.msgid.link/79020c006c15dda9d057946530f16cfb4650d450.1769479330.git.adrianhoyin.ng@altera.com Signed-off-by: Alexandre Belloni

i3c: dw: Fix memory leak in dw_i3c_master_i2c_xfers()

2026-01-30T23:03:46Z

The dw_i3c_master_i2c_xfers() function allocates memory for the xfer structure using dw_i3c_master_alloc_xfer(). If pm_runtime_resume_and_get() fails, the function returns without freeing the allocated xfer, resulting in a memory leak. Add a dw_i3c_master_free_xfer() call to the error path to ensure the allocated memory is properly freed. Compile tested only. Issue found using a prototype static analysis tool and code review. Fixes: 62fe9d06f570 ("i3c: dw: Add power management support") Signed-off-by: Zilin Guan Reviewed-by: Frank Li Link: https://patch.msgid.link/20260126081121.644099-1-zilin@seu.edu.cn Signed-off-by: Alexandre Belloni

i3c: mipi-i3c-hci-pci: Add System Suspend support

2026-01-30T23:02:24Z

Assign the driver PM operations pointer, which is necessary for the PCI subsystem to put the device into a low power state. Refer to pci_pm_suspend_noirq() which bails out if the pointer is NULL, before it has the opportunity to call pci_prepare_to_sleep(). No other actions are necessary as the mipi-i3c-hci driver takes care of controller state. Signed-off-by: Adrian Hunter Reviewed-by: Frank Li Link: https://patch.msgid.link/20260123063325.8210-4-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni

i3c: mipi-i3c-hci: Add optional System Suspend support

2026-01-30T23:02:24Z

Add system suspend callbacks. Implement them by forcing runtime PM. Consequently bail out if Runtime PM is not allowed. On resume from System Suspend (suspend to RAM), rerun Dynamic Address Assignment to restore addresses for devices that may have lost power. On resume from System Hibernation (suspend to disk), use the new i3c_master_do_daa_ext() helper with 'rstdaa' set to true, which additionally handles the case where devices are assigned different dynamic addresses after a hibernation boot. Signed-off-by: Adrian Hunter Reviewed-by: Frank Li Link: https://patch.msgid.link/20260123063325.8210-3-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni

i3c: master: Add i3c_master_do_daa_ext() for post-hibernation address recovery

2026-01-30T23:02:24Z

After system hibernation, I3C Dynamic Addresses may be reassigned at boot and no longer match the values recorded before suspend. Introduce i3c_master_do_daa_ext() to handle this situation. The restore procedure is straightforward: issue a Reset Dynamic Address Assignment (RSTDAA), then run the standard DAA sequence. The existing DAA logic already supports detecting and updating devices whose dynamic addresses differ from previously known values. Refactor the DAA path by introducing a shared helper used by both the normal i3c_master_do_daa() path and the new extended restore function, and correct the kernel-doc in the process. Export i3c_master_do_daa_ext() so that master drivers can invoke it from their PM restore callbacks. Signed-off-by: Adrian Hunter Reviewed-by: Frank Li Link: https://patch.msgid.link/20260123063325.8210-2-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni