grub2/0050-grub-core-disk-ahci.c-Do-not-enable-I-O-decoding-and.patch

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From 8a51c8b80452b6156148177dff95532160a88541 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Wed, 29 Jan 2014 23:43:25 +0100
Subject: [PATCH 050/103] * grub-core/disk/ahci.c: Do not enable I/O
decoding and keep enabling busmaster for the end.
---
ChangeLog | 5 +++++
grub-core/disk/ahci.c | 10 ++++++----
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 7aac69a..1b8aae2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
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.
+
+2014-01-29 Vladimir Serbinenko <phcoder@gmail.com>
+
* util/grub-mkfont.c: Downgrade warnings about unhandled features
to debug.
diff --git a/grub-core/disk/ahci.c b/grub-core/disk/ahci.c
index 0b13fb8..18c1327 100644
--- a/grub-core/disk/ahci.c
+++ b/grub-core/disk/ahci.c
@@ -194,10 +194,8 @@ grub_ahci_pciinit (grub_pci_device_t dev,
return 0;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
- grub_pci_write_word (addr, grub_pci_read_word (addr) |
- GRUB_PCI_COMMAND_IO_ENABLED
- | GRUB_PCI_COMMAND_MEM_ENABLED
- | GRUB_PCI_COMMAND_BUS_MASTER);
+ grub_pci_write_word (addr, grub_pci_read_word (addr)
+ | GRUB_PCI_COMMAND_MEM_ENABLED);
hba = grub_pci_device_map_range (dev, bar & GRUB_PCI_ADDR_MEM_MASK,
sizeof (hba));
@@ -621,6 +619,10 @@ grub_ahci_pciinit (grub_pci_device_t dev,
if (adevs[i] && (adevs[i]->hba->ports[adevs[i]->port].sig >> 16) == 0xeb14)
adevs[i]->atapi = 1;
+ addr = grub_pci_make_address (dev, GRUB_PCI_REG_COMMAND);
+ grub_pci_write_word (addr, grub_pci_read_word (addr)
+ | GRUB_PCI_COMMAND_BUS_MASTER);
+
for (i = 0; i < nports; i++)
if (adevs[i])
{
--
1.9.0