From d8b18f6b814a830dd1279669e10fb5f714e2138f Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Wed, 29 Jan 2014 23:45:18 +0100
Subject: [PATCH 052/198] * grub-core/disk/ahci.c: Allocate and clean space for
 all possible 32 slots to avoid pointing to uninited area.

---
 ChangeLog             | 5 +++++
 grub-core/disk/ahci.c | 8 +++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 51eba95..9bb1817 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2014-01-29  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	* grub-core/disk/ahci.c: Allocate and clean space for all possible 32
+	slots to avoid pointing to uninited area.
+
+2014-01-29  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	* grub-core/disk/ahci.c: Do not enable I/O decoding and keep
 	enabling busmaster for the end.
 
diff --git a/grub-core/disk/ahci.c b/grub-core/disk/ahci.c
index 18c1327..d63fd09 100644
--- a/grub-core/disk/ahci.c
+++ b/grub-core/disk/ahci.c
@@ -358,7 +358,7 @@ grub_ahci_pciinit (grub_pci_device_t dev,
 	grub_dprintf ("ahci", "err: %x\n",
 		      adevs[i]->hba->ports[adevs[i]->port].sata_error);
 
-	adevs[i]->command_list_chunk = grub_memalign_dma32 (1024, sizeof (struct grub_ahci_cmd_head));
+	adevs[i]->command_list_chunk = grub_memalign_dma32 (1024, sizeof (struct grub_ahci_cmd_head) * 32);
 	if (!adevs[i]->command_list_chunk)
 	  {
 	    adevs[i] = 0;
@@ -376,6 +376,12 @@ grub_ahci_pciinit (grub_pci_device_t dev,
 
 	adevs[i]->command_list = grub_dma_get_virt (adevs[i]->command_list_chunk);
 	adevs[i]->command_table = grub_dma_get_virt (adevs[i]->command_table_chunk);
+
+	grub_memset ((void *) adevs[i]->command_list, 0,
+		     sizeof (struct grub_ahci_cmd_table));
+	grub_memset ((void *) adevs[i]->command_table, 0,
+		     sizeof (struct grub_ahci_cmd_head) * 32);
+
 	adevs[i]->command_list->command_table_base
 	  = grub_dma_get_phys (adevs[i]->command_table_chunk);
 
-- 
2.7.4