Re: drivers/block/scsi_ioctl problem

[Jens Axboe <axboe@suse.de>]

On Tue, Dec 14 2004, Brian King wrote:
> Can someone explain to me the need for this bit of code in 
> drivers/block/scsi_ioctl.c:
> 
> if (!(type & CMD_WARNED)) {
> 	cmd_type[cmd[0]] = CMD_WARNED;
> 	printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
> }
> 
> I'm trying to convert an application to use SG_IO to /dev/sd* devices 
> rather than using /dev/sg* devices and this is one problem I have been 
> running into. Any time I issue a vendor specific scsi opcode I end up 
> getting one of these error logs. Is there a good reason this error log 
> is needed?

It was added to be able to find out which opcode was rejected and thus
caused an application malfunction. It dumps the specific opcode only
once, is that such a huge problem?

-- 
Jens Axboe