from: Brian Pomerantz <[email protected]>
Source: MontaVista Software, Inc.
MR: 17525
Type: Defect Fix
Disposition: local
Description:
The reading of the DRA registers should be a byte at a time (one
register at a time) instead of 4 bytes at a time (four registers).
Reading a dword at a time retrieves erronious information from all
but the first register. A change was made to read in each
register in a loop prior to using the data in those registers.
Signed-off-by: Brian Pomerantz <[email protected]>
Signed-off-by: Dave Jiang <[email protected]>
Signed-off-by: Doug Thompson <[email protected]>
e752x_edac.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
Index: linux-2.6.18/drivers/edac/e752x_edac.c
===================================================================
--- linux-2.6.18.orig/drivers/edac/e752x_edac.c
+++ linux-2.6.18/drivers/edac/e752x_edac.c
@@ -787,7 +787,12 @@ static void e752x_init_csrows(struct mem
u8 value;
u32 dra, drc, cumul_size;
- pci_read_config_dword(pdev, E752X_DRA, &dra);
+ dra = 0;
+ for (index=0; index < 4; index++) {
+ u8 dra_reg;
+ pci_read_config_byte(pdev, E752X_DRA+index, &dra_reg);
+ dra |= dra_reg << (index * 8);
+ }
pci_read_config_dword(pdev, E752X_DRC, &drc);
drc_chan = dual_channel_active(ddrcsr);
drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */
-
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