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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2011-05-03 14:54:12 -0500
committerJens Axboe <jaxboe@fusionio.com>2011-05-06 08:23:59 -0600
commit8a4ec67bd5648beb09d7db988a75835b740e950d (patch)
tree745a87ec016b79f3cf425f581c38090a4ff8f270 /drivers/block/cciss_scsi.h
parent063d2cf72ab6101d2dd69bd6fb503b229be70325 (diff)
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cciss: add cciss_tape_cmds module paramter
This is to allow number of commands reserved for use by SCSI tape drives and medium changers to be adjusted at driver load time via the kernel parameter cciss_tape_cmds, with a default value of 6, and a range of 2 - 16 inclusive. Previously, the driver limited the number of commands which could be queued to the SCSI half of the the driver to only 2. This is to fix the problem that if you had more than two tape drives, you couldn't, for example, erase or rewind them all at the same time. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block/cciss_scsi.h')
-rw-r--r--drivers/block/cciss_scsi.h4
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/block/cciss_scsi.h b/drivers/block/cciss_scsi.h
index 6d5822f..e71d986 100644
--- a/drivers/block/cciss_scsi.h
+++ b/drivers/block/cciss_scsi.h
@@ -36,13 +36,9 @@
addressible natively, and may in fact turn
out to be not scsi at all. */
-#define SCSI_CCISS_CAN_QUEUE 2
/*
-Note, cmd_per_lun could give us some trouble, so I'm setting it very low.
-Likewise, SCSI_CCISS_CAN_QUEUE is set very conservatively.
-
If the upper scsi layer tries to track how many commands we have
outstanding, it will be operating under the misapprehension that it is
the only one sending us requests. We also have the block interface,
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