diff options
| author | Brian Pomerantz <bapper@mvista.com> | 2007-02-12 00:53:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 09:48:32 -0800 |
| commit | 9962fd017becf944d671da498ccaaea570452206 (patch) | |
| tree | fcb47a80c9a398a3840fee689f7486cb7d8ab9c1 | |
| parent | dfb2a76378f095b0aaa2024ce9a8cfb2ae2354d2 (diff) | |
[PATCH] EDAC: e752x byte access fix
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 erroneous 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 <bapper@mvista.com>
Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Doug Thompson <norsk5@xmission.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andi Kleen <ak@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/edac/e752x_edac.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c index ab9873924f4..9abfc0dc3ba 100644 --- a/drivers/edac/e752x_edac.c +++ b/drivers/edac/e752x_edac.c @@ -782,7 +782,12 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev, 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 */ |