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[SCSI] fix oops on usb storage device disconnect

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We fix the oops by enforcing the host state model.  There have also
been two extra states added: SHOST_CANCEL_RECOVERY and
SHOST_DEL_RECOVERY so we can take the model through host removal while
the recovery thread is active.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2005-09-18 15:05:20 -05:00
committed by James Bottomley
parent a64358db12
commit 939647ee30
8 changed files with 66 additions and 16 deletions
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drivers/scsi/sg.c
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@@ -1027,7 +1027,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
if (sdp->detached)
return -ENODEV;
if (filp->f_flags & O_NONBLOCK) {
if (sdp->device->host->shost_state == SHOST_RECOVERY)
if (scsi_host_in_recovery(sdp->device->host))
return -EBUSY;
} else if (!scsi_block_when_processing_errors(sdp->device))
return -EBUSY;