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Koen Kooi
6203cbca5c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
From 63a96e329f2c66af145a93d6f42067e54ef932af Mon Sep 17 00:00:00 2001
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From: Roland Dreier <roland@purestorage.com>
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Date: Mon, 16 Jul 2012 17:10:17 -0700
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Subject: [PATCH 060/109] target: Fix range calculation in WRITE SAME
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emulation when num blocks == 0
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commit 1765fe5edcb83f53fc67edeb559fcf4bc82c6460 upstream.
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When NUMBER OF LOGICAL BLOCKS is 0, WRITE SAME is supposed to write
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all the blocks from the specified LBA through the end of the device.
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However, dev->transport->get_blocks(dev) (perhaps confusingly) returns
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the last valid LBA rather than the number of blocks, so the correct
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number of blocks to write starting with lba is
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dev->transport->get_blocks(dev) - lba + 1
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(nab: Backport roland's for-3.6 patch to for-3.5)
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Signed-off-by: Roland Dreier <roland@purestorage.com>
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Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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drivers/target/target_core_cdb.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c
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index 65ea65a..93b9406 100644
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--- a/drivers/target/target_core_cdb.c
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+++ b/drivers/target/target_core_cdb.c
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@@ -1199,7 +1199,7 @@ int target_emulate_write_same(struct se_task *task)
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if (num_blocks != 0)
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range = num_blocks;
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else
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- range = (dev->transport->get_blocks(dev) - lba);
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+ range = (dev->transport->get_blocks(dev) - lba) + 1;
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pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
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(unsigned long long)lba, (unsigned long long)range);
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--
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1.7.7.6
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