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Revamp the warning of failing to set BIOS write enable in enable_flash_ich

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- introduce a new variable 'wanted' that is used instead of 'new'
 - use 'new' for the actual value contained in BIOS_CNTL after we tried to write it
 - rephrase the warning which now also includes the old and new values besides the wanted one

Corresponding to flashrom svn r1435.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
This commit is contained in:
Stefan Tauner 2011-09-09 12:46:32 +00:00
parent c74e977627
commit d5c4ab4cfd
1 changed files with 8 additions and 7 deletions
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15
chipset_enable.c
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@ -256,7 +256,7 @@ static int enable_flash_piix4(struct pci_dev *dev, const char *name)
static int enable_flash_ich(struct pci_dev *dev, const char *name,
int bios_cntl)
{
uint8_t old, new;
uint8_t old, new, wanted;
/*
* Note: the ICH0-ICH5 BIOS_CNTL register is actually 16 bit wide, but
@ -280,15 +280,16 @@ static int enable_flash_ich(struct pci_dev *dev, const char *name,
if (old & (1 << 5))
msg_pinfo("WARNING: BIOS region SMM protection is enabled!\n");
new = old | 1;
if (new == old)
wanted = old | 1;
if (wanted == old)
return 0;
rpci_write_byte(dev, bios_cntl, new);
rpci_write_byte(dev, bios_cntl, wanted);
if (pci_read_byte(dev, bios_cntl) != new) {
msg_pinfo("Setting register 0x%x to 0x%x on %s failed "
"(WARNING ONLY).\n", bios_cntl, new, name);
if ((new = pci_read_byte(dev, bios_cntl)) != wanted) {
msg_pinfo("WARNING: Setting 0x%x from 0x%x to 0x%x on %s "
"failed. New value is 0x%x.\n",
bios_cntl, old, wanted, name, new);
return -1;
}