From: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
According to Intel PIIX4 datasheet: The memory address consists of a 17-bit
base address (AD[31:15]) and a 7-bit mask (AD[21:15]). This provides memory
ranges from 32 Kbytes to 4 Mbytes in size.
This is true for both devices 12 and 13. This patch fixes it.
Ref 1: www.intel.com/assets/pdf/datasheet/290562.pdf
April 1997 version 001 (p131 bottom, p226 top)
Ref 2: www.intel.com/assets/pdf/specupdate/297738.pdf
January 2002 version 017 (Nothing against the fix in the
specification update was found.)
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
Reviewed-by: James Hogan <james.hogan@xxxxxxxxxx>
---
drivers/pci/quirks.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index f6c31fa..3e7e489 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -414,9 +414,9 @@ static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int
pci_read_config_dword(dev, port, &devres);
if ((devres & enable) != enable)
return;
- base = devres & 0xffff0000;
- mask = (devres & 0x3f) << 16;
- size = 128 << 16;
+ base = devres & 0xffff8000;
+ mask = (devres & 0x7f) << 15;
+ size = 128 << 15;
for (;;) {
unsigned bit = size >> 1;
if ((bit & mask) == bit)
--
1.7.1
--
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