commit 906d15fbd23c1267addab361063c1c8119992215
author Christoph Hellwig <hch@lst.de> Sat Oct 11 16:25:31 2014 +0200
committer Christoph Hellwig <hch@lst.de> Wed Nov 12 11:16:11 2014 +0100
tree 419ba148925c3651fe9337af24a932097e2c3d8a
parent 176aa9d6ee2db582e7e856dbe1983004a82869b4

scsi: split scsi_nonblockable_ioctl

The calling conventions for this function are bad as it could return
-ENODEV both for a device not currently online and a not recognized ioctl.

Add a new scsi_ioctl_block_when_processing_errors function that wraps
scsi_block_when_processing_errors with the a special case for the
SG_SCSI_RESET ioctl command, and handle the SG_SCSI_RESET case itself
in scsi_ioctl.  All callers of scsi_ioctl now must call the above helper
to check for the EH state, so that the ioctl handler itself doesn't
have to.

Reported-by: Robert Elliott <Elliott@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>