[PATCH] add missing free sgtable in scsi_init_io error path

[Mike Christie <michaelc@cs.wisc.edu>]

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I was testing different errors while running multipath, and becuase of a 
bug in dm-multiapth I hit the "Incorrect number of segments after 
building list" error. The attached patch just adds a missing 
scsi_release_buffers() at the bottom of the scsi_init_io where the table 
was allocated successfully, but you can return BLKPREP_KILL when someone 
messes up segment counts.

Mike Christie

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--- linux-2.6.4-rc1-orig/drivers/scsi/scsi_lib.c	2004-02-27 14:21:02.000000000 -0800
+++ linux-2.6.4-rc1-scsi/drivers/scsi/scsi_lib.c	2004-03-03 00:22:31.030243228 -0800
@@ -917,6 +917,7 @@ static int scsi_init_io(struct scsi_cmnd
 			req->current_nr_sectors);
 
 	/* release the command and kill it */
+	scsi_release_buffers(cmd);
 	scsi_put_command(cmd);
 	return BLKPREP_KILL;
 }