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From 466d66e193341115f2a48e27997d61d8fddc811e Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Fri, 31 Oct 2014 16:29:56 +0100
Subject: [PATCH 19/19] ide: only constrain read/write requests to drive size,
 not other types

Message-id: <1414772996-17272-6-git-send-email-armbru@redhat.com>
Patchwork-id: 62017
O-Subject: [PATCH RHEL-7.1 qemu-kvm 5/5] ide: only constrain read/write requests to drive size, not other types
Bugzilla: 1085232
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Fam Zheng <famz@redhat.com>

From: Michael Tokarev <mjt@tls.msk.ru>

Commit 58ac321135a introduced a check to ide dma processing which
constrains all requests to drive size.  However, apparently, some
valid requests (like TRIM) does not fit in this constraint, and
fails in 2.1.  So check the range only for reads and writes.

Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit d66168ed687325aa6d338ce3a3cff18ce3098ed6)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/ide/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/ide/core.c b/hw/ide/core.c
index 4c36f52..24a1708 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -702,7 +702,8 @@ void ide_dma_cb(void *opaque, int ret)
            sector_num, n, s->dma_cmd);
 #endif
 
-    if (!ide_sect_range_ok(s, sector_num, n)) {
+    if ((s->dma_cmd == IDE_DMA_READ || s->dma_cmd == IDE_DMA_WRITE) &&
+        !ide_sect_range_ok(s, sector_num, n)) {
         dma_buf_commit(s);
         ide_dma_error(s);
         return;
-- 
1.8.3.1