kernel/linux.git/drivers/ptp/ptp_sysfs.c, branch linux-7.1.y

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

ptp: Add a upper bound on max_vclocks

2025-09-26T22:30:31+00:00

syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc Reported-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=94d20db923b9f51be0df Tested-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com Fixes: 73f37068d540 ("ptp: support ptp physical/virtual clocks conversion") Signed-off-by: I Viswanath Acked-by: Richard Cochran Link: https://patch.msgid.link/20250925155908.5034-1-viswanathiyyappan@gmail.com Signed-off-by: Jakub Kicinski

ptp: fix integer overflow in max_vclocks_store

2024-06-18T20:26:44+00:00

On 32bit systems, the "4 * max" multiply can overflow. Use kcalloc() to do the allocation to prevent this. Fixes: 44c494c8e30e ("ptp: track available ptp vclocks information") Signed-off-by: Dan Carpenter Reviewed-by: Wojciech Drewek Reviewed-by: Jiri Pirko Reviewed-by: Heng Qi Link: https://lore.kernel.org/r/ee8110ed-6619-4bd7-9024-28c1f2ac24f4@moroto.mountain Signed-off-by: Jakub Kicinski

drivers/ptp: Convert snprintf to sysfs_emit

2024-01-27T04:35:17+00:00

Per filesystems/sysfs.rst, show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. coccinelle complains that there are still a couple of functions that use snprintf(). Convert them to sysfs_emit(). > ./drivers/ptp/ptp_sysfs.c:27:8-16: WARNING: please use sysfs_emit No functional change intended Signed-off-by: Li Zhijian Acked-by: Richard Cochran Link: https://lore.kernel.org/r/20240125015329.123023-1-lizhijian@fujitsu.com Signed-off-by: Jakub Kicinski

ptp: annotate data-race around q->head and q->tail

2023-11-14T04:51:37+00:00

As I was working on a syzbot report, I found that KCSAN would probably complain that reading q->head or q->tail without barriers could lead to invalid results. Add corresponding READ_ONCE() and WRITE_ONCE() to avoid load-store tearing. Fixes: d94ba80ebbea ("ptp: Added a brand new class driver for ptp clocks.") Signed-off-by: Eric Dumazet Acked-by: Richard Cochran Link: https://lore.kernel.org/r/20231109174859.3995880-1-edumazet@google.com Signed-off-by: Jakub Kicinski

ptp: support multiple timestamp event readers

2023-10-15T19:07:52+00:00

Use linked lists to create one event queue per open file. This enables simultaneous readers for timestamp event queues. Signed-off-by: Xabier Marquiegui Suggested-by: Richard Cochran Signed-off-by: David S. Miller

ptp: Replace timestamp event queue with linked list

2023-10-15T19:07:52+00:00

Introduce linked lists to access the timestamp event queue. Signed-off-by: Xabier Marquiegui Suggested-by: Richard Cochran Signed-off-by: David S. Miller

ptp: Make max_phase_adjustment sysfs device attribute invisible when not supported

2023-07-03T20:17:25+00:00

The .adjphase operation is an operation that is implemented only by certain PHCs. The sysfs device attribute node for querying the maximum phase adjustment supported should not be exposed on devices that do not support .adjphase. Fixes: c3b60ab7a4df ("ptp: Add .getmaxphase callback to ptp_clock_info") Signed-off-by: Rahul Rameshbabu Reported-by: Nathan Chancellor Reported-by: Naresh Kamboju Reported-by: Linux Kernel Functional Testing Link: https://lore.kernel.org/netdev/20230627162146.GA114473@dev-arch.thelio-3990X/ Link: https://lore.kernel.org/all/CA+G9fYtKCZeAUTtwe69iK8Xcz1mOKQzwcy49wd+imZrfj6ifXA@mail.gmail.com/ Tested-by: Nathan Chancellor Reviewed-by: Andrew Lunn Acked-by: Richard Cochran Reviewed-by: Petr Vorel Message-ID: <20230627232139.213130-1-rrameshbabu@nvidia.com> Signed-off-by: Jakub Kicinski

ptp: Add .getmaxphase callback to ptp_clock_info

2023-06-20T08:02:33+00:00

Enables advertisement of the maximum offset supported by the phase control functionality of PHCs. The callback is used to return an error if an offset not supported by the PHC is used in ADJ_OFFSET. The ioctls PTP_CLOCK_GETCAPS and PTP_CLOCK_GETCAPS2 now advertise the maximum offset a PHC's phase control functionality is capable of supporting. Introduce new sysfs node, max_phase_adjustment. Cc: Jakub Kicinski Cc: Shuah Khan Cc: Richard Cochran Cc: Maciek Machnikowski Signed-off-by: Rahul Rameshbabu Acked-by: Richard Cochran Signed-off-by: David S. Miller