Re: [PATCH 17/24] scsi_ioctl: simplify SCSI passthrough permission checking

On Thu, Jul 22, 2021 at 10:47:35AM -0700, Bart Van Assche wrote:

The first time I encountered this function it was not clear to me what the 
purpose of this function is. I think this is a good time to add a comment 
above this function that explains its purpose, namely to prevent that 
unprivileged SG I/O users can modify storage device firmware.

Or generally do unexpected things, yes.  I'll add a patch at the end of
the series to avoid the pain of adding a comment first and then moving
the whole code around.