kernel/linux.git/drivers/w1/w1.c, branch v7.1

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

w1: fix redundant counter decrement in w1_attach_slave_device()

2025-12-28T10:52:10+00:00

In w1_attach_slave_device(), if __w1_attach_slave_device() fails, put_device() -> w1_slave_release() is called to do the cleanup job. In w1_slave_release(), sl->family->refcnt and sl->master->slave_count have already been decremented. There is no need to decrement twice in w1_attach_slave_device(). Fixes: 2c927c0c73fd ("w1: Fix slave count on 1-Wire bus (resend)") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li Link: https://patch.msgid.link/20251218111414.564403-1-lihaoxiang@isrc.iscas.ac.cn Signed-off-by: Krzysztof Kozlowski

w1: use sysfs_emit() in sysfs show() callbacks

2025-10-13T00:19:03+00:00

Replace sprintf in sysfs show() paths with sysfs_emit(), per Documentation/filesystems/sysfs.rst. Signed-off-by: Vivek BalachandharTN Signed-off-by: Krzysztof Kozlowski

sysfs: treewide: switch back to attribute_group::bin_attrs

2025-06-17T08:44:15+00:00

The normal bin_attrs field can now handle const pointers. This makes the _new variant unnecessary. Switch all users back. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20250530-sysfs-const-bin_attr-final-v3-4-724bfcf05b99@weissschuh.net Signed-off-by: Greg Kroah-Hartman

w1: Constify 'struct bin_attribute'

2024-12-14T10:05:56+00:00

The sysfs core now allows instances of 'struct bin_attribute' to be moved into read-only memory. Make use of that to protect them against accidental or malicious modifications. Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/r/20241211-sysfs-const-bin_attr-w1-v1-1-c4befd2aa7cc@weissschuh.net Signed-off-by: Krzysztof Kozlowski

w1: Add missing newline and fix typos in w1_bus_master comment

2024-05-27T11:51:29+00:00

- Add missing newline before @return - s/bytes/byte/ - s/handles/handle/ - s/exists/exist/ in dev_info() message Signed-off-by: Thorsten Blum Link: https://lore.kernel.org/r/20240527092746.263038-2-thorsten.blum@toblux.com [krzysztof: squash "w1: Fix typo in dev_info() message"] Signed-off-by: Krzysztof Kozlowski

w1: make w1_bus_type const

2024-02-15T13:55:05+00:00

Now that the driver core can properly handle constant struct bus_type, move the w1_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Suggested-by: Greg Kroah-Hartman Signed-off-by: Ricardo B. Marliere Link: https://lore.kernel.org/r/20240204-bus_cleanup-w1-v1-1-a0f4c84d7db3@marliere.net Signed-off-by: Krzysztof Kozlowski

w1: Replace usage of found with dedicated list iterator variable

2023-05-13T19:15:02+00:00

To move the list iterator variable into the list_for_each_entry_*() macro in the future it should be avoided to use the list iterator variable after the loop body. To *never* use the list iterator variable after the loop it was concluded to use a separate iterator variable instead of a found boolean [1]. This removes the need to use a found variable and simply checking if the variable was set, can determine if the break/goto was hit. Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1] Signed-off-by: Jakob Koschel Link: https://lore.kernel.org/r/20230509-w1-replace-usage-of-found-with-tmp-list-iterator-variable-v3-1-e07c9603fd9d@gmail.com Signed-off-by: Krzysztof Kozlowski

w1: Add missing of_node_put() in w1.c

2023-05-08T06:14:52+00:00

In __w1_attach_slave_device, we really need not to use of_node_put in normal path as the reference is escaped by sl. However, we need of_node_put in the fail path before put_device. Signed-off-by: Liang He Link: https://lore.kernel.org/r/20220615125105.3966317-1-windhl@126.com [krzysztof: fix whitespace / checkpatch] Signed-off-by: Krzysztof Kozlowski