problem with ending requests asynchronously in my block devicedriver

[a_kumar]

Hi, 

I've a block device driver which does the following, 

Inside the request function I do something like this: 
request(fn) { 

 while ((req = elv_next_request(q)) != NULL) { 
....................set up the request; 
 spin_unlock_irq(q->queue_lock); 
call the transfer(set_up_req) function; 
spin_lock_irq(q->queue_lock); 
} 
       spin_unlock_irq (q->queue_lock); 
        /* allow callback to execute as it needs the lock!!! */ 
        spin_lock_irq (q->queue_lock); 


} 
and the transfer function calls the scsi_execute_asyn(....) with the
callback function doing the end request. So, the ending of the request is
done like below: 

callback(fn) { 

 spin_lock_irqsave(q->queue_lock, flags); 
        if (!end_that_request_first(set_up_req->req, cmpstatus, 
                        set_up_req->req->nr_sectors)) { 
                add_disk_randomness(...); 
                end_that_request_last(set_up_req->req,0); 
        } 
        spin_unlock_irqrestore(q->queue_lock, flags); 
} 


This code works fine with most of the kernel versions, but fails on some
like , Linux 2.6.18-8.el5-xen 

Please help me to find out where I'm going wrong? 

Thanks in advance for an early reply. 
Anil P. 


-- 
View this message in context: http://www.nabble.com/problem-with-ending-requests-asynchronously-in-my-block-device-driver-tp14355076p14355076.html
Sent from the linux-kernel mailing list archive at Nabble.com.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/