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Date:      Mon, 16 Jul 2001 10:34:49 -0400 (EDT)
From:      Mike Brown <mbrown@cs.uml.edu>
To:        Vincent Cojot <coyote@step.polymtl.ca>
Cc:        linux-scsi@vger.kernel.org, aic7xxx@FreeBSD.ORG
Subject:   Re: Naive question: 2.2.x or 2.4.x drvconfig equivalent in the works?
Message-ID:  <Pine.OSF.3.96.1010716102137.246191A-100000@venus.cs.uml.edu>

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> Is there a device-specific (perhaps?) way to force a bus reset?

Take a look at <linux>/include/scsi/sg.h

One of the ioctl()'s is defined as:

#define SG_SCSI_RESET 0x2284

with subcommands:

#define         SG_SCSI_RESET_NOTHING   0
#define         SG_SCSI_RESET_DEVICE    1
#define         SG_SCSI_RESET_BUS       2
#define         SG_SCSI_RESET_HOST      3

I gather you could get the job done via something like:

#define MY_SG_DEV "/dev/sg0"

int fd = open (MY_SG_DEV, O_RDWR);

ioctl (fd, SG_SCSI_RESET, SG_SCSI_RESET_BUS);


-Michael F. Brown, UMass Lowell Computer Science

email:  mbrown@cs.uml.edu

"Windows is a 32 bit patch to a 16 bit GUI based on an 8 bit 
 operating system."        -FAQs (from #linux on efnet) 


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