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| author | Takashi Iwai <tiwai@suse.de> | 2022-04-13 10:43:03 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-04-13 10:43:28 +0200 |
| commit | 651a88798412e216f337d70181127e847f00a4b7 (patch) | |
| tree | 5fefb107fa9b3fa74dcc3e7ce410c5a1d571549d /include/uapi/linux/rfkill.h | |
| parent | 1b6a6fc5280e97559287b61eade2d4b363e836f2 (diff) | |
| parent | bb06c203f86766fc2c37cbce0e20e9daae786f6e (diff) | |
| download | cachepc-linux-651a88798412e216f337d70181127e847f00a4b7.tar.gz cachepc-linux-651a88798412e216f337d70181127e847f00a4b7.zip | |
Merge branch 'topic/cs35l41' into for-next
Pull CS35L41 codec updates
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/uapi/linux/rfkill.h')
| -rw-r--r-- | include/uapi/linux/rfkill.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/uapi/linux/rfkill.h b/include/uapi/linux/rfkill.h index 9b77cfc42efa..283c5a7b3f2c 100644 --- a/include/uapi/linux/rfkill.h +++ b/include/uapi/linux/rfkill.h @@ -159,8 +159,16 @@ struct rfkill_event_ext { * old behaviour for all userspace, unless it explicitly opts in to the * rules outlined here by using the new &struct rfkill_event_ext. * - * Userspace using &struct rfkill_event_ext must adhere to the following - * rules + * Additionally, some other userspace (bluez, g-s-d) was reading with a + * large size but as streaming reads rather than message-based, or with + * too strict checks for the returned size. So eventually, we completely + * reverted this, and extended messages need to be opted in to by using + * an ioctl: + * + * ioctl(fd, RFKILL_IOCTL_MAX_SIZE, sizeof(struct rfkill_event_ext)); + * + * Userspace using &struct rfkill_event_ext and the ioctl must adhere to + * the following rules: * * 1. accept short writes, optionally using them to detect that it's * running on an older kernel; @@ -175,6 +183,8 @@ struct rfkill_event_ext { #define RFKILL_IOC_MAGIC 'R' #define RFKILL_IOC_NOINPUT 1 #define RFKILL_IOCTL_NOINPUT _IO(RFKILL_IOC_MAGIC, RFKILL_IOC_NOINPUT) +#define RFKILL_IOC_MAX_SIZE 2 +#define RFKILL_IOCTL_MAX_SIZE _IOW(RFKILL_IOC_MAGIC, RFKILL_IOC_EXT_SIZE, __u32) /* and that's all userspace gets */ |