kernel/linux.git/drivers/thunderbolt/path.c, branch v7.0-rc7

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

2026-02-22T01:09:51+00:00

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

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+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

thunderbolt: Log path activation failures without WARN backtraces

2026-01-05T11:14:43+00:00

tb_path_activate() currently logs failures with tb_WARN(), which triggers a stack trace. Transient conditions such as lane bonding or Type-C link hiccups can fail path activation briefly, and the resulting backtraces are noisy without aiding diagnosis. Switch to tb_warn() for all path activation failures. The error code is already returned to callers, and the warning still shows the message without the backtrace. Signed-off-by: Chia-Lin Kao (AceLan) Signed-off-by: Mika Westerberg

thunderbolt: Update path.c function documentation

2025-09-17T05:32:59+00:00

Make path.c function documentation compliant with current kernel-doc standards. No functional changes. Signed-off-by: Alan Borzeszkowski Signed-off-by: Mika Westerberg

thunderbolt: Show path name in debug log when path is deactivated

2025-01-03T09:50:08+00:00

Similarly as we do when activating the path. Helps in debugging. Signed-off-by: Mika Westerberg

thunderbolt: Introduce tb_path_deactivate_hop()

2024-01-22T11:21:06+00:00

This function can be used to clear path config space of an adapter. Make it available for other files in this driver. Signed-off-by: Sanath S Signed-off-by: Mika Westerberg

thunderbolt: Set path power management packet support bit for USB4 v2 routers

2023-10-20T15:18:01+00:00

USB4 v2 spec allows USB4 links that are part of a pass through tunnel (such as DisplayPort and USB 3.x Gen T) to enter lower CL states, which provide better power management. For this USB4 v2 routers in their path config space of lane 0 adapter include a new bit PMPS (PM packet support) that needs to be set. Signed-off-by: Mika Westerberg

thunderbolt: Dump path config space entries during discovery

2022-04-19T07:26:13+00:00

This is useful when debugging possible issues during tunnel discovery. Signed-off-by: Mika Westerberg Tested-by: Brad Campbell

thunderbolt: Tear down existing tunnels when resuming from hibernate

2021-12-07T12:18:33+00:00

If the boot firmware implements connection manager of its own it may not create the paths in the same way or order we do. For example it may create first PCIe tunnel and then USB3 tunnel. When we restore our tunnels (first de-activating them) we may be doing that over completely different tunnels and that leaves them possibly non-functional. For this reason we re-use the tunnel discovery functionality and find out all the existing tunnels, and tear them down. Once that is done we can restore our tunnels. Signed-off-by: Mika Westerberg

thunderbolt: Move nfc_credits field to struct tb_path_hop

2021-06-01T07:48:59+00:00

With the USB4 buffer allocation the number of credits (and non-flow credits) may be different depending on the router buffer allocation preferences. To allow this move the nfc_credits field to struct tb_path_hop. Signed-off-by: Mika Westerberg