Re: [PATCH] ocfs2: fix uninitialized variable in ocfs2_dio_wr_get_block()

[Joseph Qi]

On 12/1/21 10:24 AM, Joseph Qi wrote:
> 
> 
> On 11/30/21 6:40 PM, Dan Carpenter wrote:
>> The callers assume that "*fsdata" is set on the success path, but
>> that's not necessarily true on this path.
>>
> 
> In ocfs2_page_mkwrite(), since in this case no target page locked, it
> will finally return VM_FAULT_NOPAGE (better VM_FAULT_RETRY?) and throw 
> to handle_mm_fault(). So no problem as comments described.
> 
> But things seems changed since append direct io path started to use
> write_[begin/end]. In this path, the target page is expected as NULL.
> This needs more discussion.
> 

ocfs2_grab_pages_for_write() returns EAGAIN only in case of mmap. So
current code won't have any issue.
I'll send a cleanup to make the code more clearly.

Thanks,
Joseph