Patchwork [v2,1/7] i82378: Remove bogus MMIO coalescing

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Submitter Jan Kiszka
Date June 27, 2012, 4:27 p.m.
Message ID <>
Download mbox | patch
Permalink /patch/167703/
State New
Headers show


Jan Kiszka - June 27, 2012, 4:27 p.m.
This MMIO area is an entry gate to legacy PC ISA devices, addressed via
PIO over there. Quite a few of the PIO ports have side effects on access
like starting/stopping timers that must be executed properly ordered
/wrt the CPU. So we have to remove the coalescing mark.

Acked-by: Hervé Poussineau <>
Signed-off-by: Jan Kiszka <>
 hw/i82378.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)


diff --git a/hw/i82378.c b/hw/i82378.c
index 9b11d90..2123c14 100644
--- a/hw/i82378.c
+++ b/hw/i82378.c
@@ -225,7 +225,6 @@  static int pci_i82378_init(PCIDevice *dev)
     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->io);
     memory_region_init_io(&s->mem, &i82378_mem_ops, s, "i82378-mem", 0x01000000);
-    memory_region_set_coalescing(&s->mem);
     pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mem);
     /* Make I/O address read only */