Copy_to_user return value
User context only. This function may sleep. Description. Copy data from kernel space to user space. Returns number of bytes that could not be copied ... , It took quite a bit of debugging, but in the end Tsyvarev's hint (the comment about not calling copy_to_user with a spinlock taken) seems to have ...
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 Copy_to_user return value 相關參考資料
copy_from_user
This function may sleep. Description. Copy data from user space to kernel space. Returns number of bytes that could not be copied. On success, this ... https://www.fsl.cs.sunysb.edu copy_to_user
User context only. This function may sleep. Description. Copy data from kernel space to user space. Returns number of bytes that could not be copied ... https://www.fsl.cs.sunysb.edu copy_to_user returns an error in a char device read function ...
It took quite a bit of debugging, but in the end Tsyvarev's hint (the comment about not calling copy_to_user with a spinlock taken) seems to have ... https://stackoverflow.com Linux- copy_to_user not working, always return the buffer size ...
What user-space interface do you use for communication? Regardless what user space interface you use (chardev, ioctl, ...), the signature of ... https://stackoverflow.com Passing return value to setsockopts() caller if copy_to_user ...
If I understood your question right you have to return -EFAULT which accordingly to manual page means. EFAULT The address pointed to by ... https://stackoverflow.com return value of copy_from_user() - linux - jQuery - sql
Here is the description of the return value. unsigned long copy_from_user (void *to, const void __user *from, unsigned long count) The return value is the ... https://jquery.developreferenc return value of copy_from_user() - Stack Overflow
The copy_from_user function can fail for various reasons (typically because of an invalid address), copying only part of the requested data, ... https://stackoverflow.com User space memory access from the Linux kernel – Build ...
Like get_user , it accepts a variable (which contains the value to write) and a ... As with copy_to_user , the function returns zero on success and ... https://developer.ibm.com [轉貼] Linux Device Driver - IOCTL (copy_to_user ... - 只是記事本
Linux Device Driver - IOCTL (copy_to_user & copy_from_user) 在linux/include/linux/fs.h. ... return 0; } // mainly io control between user and kernel // args are pointed ... num 是XNUM命令時要change... https://mybeauty.pixnet.net |