From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Boaz Harrosh <bharrosh@panasas.com>
Cc: Ramya Desai <ramya.desai@gmail.com>,
Alan Stern <stern@rowland.harvard.edu>,
USB list <linux-usb@vger.kernel.org>,
linux-scsi@vger.kernel.org
Subject: Re: Return of PENDING status to SCSI driver
Date: Tue, 16 Jun 2009 14:39:18 +0000 [thread overview]
Message-ID: <1245163158.3965.38.camel@mulgrave.site> (raw)
In-Reply-To: <4A37ABDC.4050308@panasas.com>
On Tue, 2009-06-16 at 17:27 +0300, Boaz Harrosh wrote:
> scsi will call .queuecommand upto min(can_queue, .cmd_per_lun) times
> without any call to done(). Then for each done() called it will call
> .queuecommand again. (If more commands are pending)
Actually, there's one extra piece to this: you have to return 0 from
your .queuecommand() routine to get the next command.
The helpful documentation for all of this is
Documentation/scsi/scsi_mid_low_api.txt
James
next prev parent reply other threads:[~2009-06-16 14:39 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-12 9:29 Return of PENDING status to SCSI driver Ramya Desai
2009-06-12 11:32 ` Jeff Garzik
2009-06-12 12:54 ` Ramya Desai
2009-06-12 17:26 ` Stefan Richter
2009-06-14 9:16 ` Boaz Harrosh
2009-06-15 12:07 ` Ramya Desai
2009-06-15 12:26 ` Matthew Wilcox
2009-06-15 12:29 ` Boaz Harrosh
[not found] ` <4A363EB4.8000102-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org>
2009-06-15 14:01 ` Alan Stern
2009-06-15 14:07 ` Ramya Desai
[not found] ` <3e7aae30906150707we781237o366950971d748b6f-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-15 14:33 ` Boaz Harrosh
2009-06-15 14:42 ` Ramya Desai
[not found] ` <3e7aae30906150742l18e74a8fua5f08686c2c76454-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-15 14:50 ` Ramya Desai
[not found] ` <3e7aae30906150750m6809aa87v35f739e0a72243d-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-15 14:59 ` Matthew Dharm
2009-06-15 14:59 ` Alan Stern
2009-06-15 16:31 ` Boaz Harrosh
[not found] ` <4A36776C.5010208-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org>
2009-06-16 13:35 ` Ramya Desai
2009-06-16 13:59 ` Alan Cox
2009-06-16 14:27 ` Boaz Harrosh
2009-06-16 14:39 ` James Bottomley [this message]
[not found] ` <4A37ABDC.4050308-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org>
2009-06-16 15:09 ` Ramya Desai
2009-06-16 15:22 ` Alan Stern
[not found] ` <3e7aae30906160809y32f0c8f6j3352cd1ec2bfe34a-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-16 15:27 ` Boaz Harrosh
[not found] ` <3e7aae30906160635g4d191a4exdb710554a349cac0-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-16 15:13 ` Alan Stern
2009-06-15 17:19 ` Jeff Garzik
2009-06-15 14:40 ` Alan Stern
2009-06-15 14:42 ` Boaz Harrosh
[not found] ` <4A365DCA.2030907-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org>
2009-06-15 14:49 ` Alan Stern
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