This is a note to let you know that I've just added the patch titled
target: Fix range calculation in WRITE SAME emulation when num blocks == 0
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-fix-range-calculation-in-write-same-emulation-when-num-blocks-0.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1765fe5edcb83f53fc67edeb559fcf4bc82c6460 Mon Sep 17 00:00:00 2001
From: Roland Dreier <[email protected]>
Date: Mon, 16 Jul 2012 17:10:17 -0700
Subject: target: Fix range calculation in WRITE SAME emulation when num blocks
== 0
From: Roland Dreier <[email protected]>
commit 1765fe5edcb83f53fc67edeb559fcf4bc82c6460 upstream.
When NUMBER OF LOGICAL BLOCKS is 0, WRITE SAME is supposed to write
all the blocks from the specified LBA through the end of the device.
However, dev->transport->get_blocks(dev) (perhaps confusingly) returns
the last valid LBA rather than the number of blocks, so the correct
number of blocks to write starting with lba is
dev->transport->get_blocks(dev) - lba + 1
(nab: Backport roland's for-3.6 patch to for-3.5)
Signed-off-by: Roland Dreier <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/target/target_core_cdb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/target/target_core_cdb.c
+++ b/drivers/target/target_core_cdb.c
@@ -1107,7 +1107,7 @@ int target_emulate_write_same(struct se_
if (num_blocks != 0)
range = num_blocks;
else
- range = (dev->transport->get_blocks(dev) - lba);
+ range = (dev->transport->get_blocks(dev) - lba) + 1;
pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
(unsigned long long)lba, (unsigned long long)range);
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/target-fix-range-calculation-in-write-same-emulation-when-num-blocks-0.patch
queue-3.4/target-clean-up-returning-errors-in-pr-handling-code.patch
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