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[TG3]: Fix nvram arbitration bugs. 

The nvram arbitration rules were not strictly followed in a few places
and this could lead to reading corrupted values from the nvram.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2005-12-13 21:08:21 -08:00 committed by David S. Miller
parent 65ab592dc5
commit 381291b7d3
1 changed files with 8 additions and 2 deletions
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10
drivers/net/tg3.c
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@ -8533,6 +8533,7 @@ static void __devinit tg3_nvram_init(struct tg3 *tp)
GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701) {
tp->tg3_flags |= TG3_FLAG_NVRAM;
tg3_nvram_lock(tp);
tg3_enable_nvram_access(tp);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
@ -8543,6 +8544,7 @@ static void __devinit tg3_nvram_init(struct tg3 *tp)
tg3_get_nvram_size(tp);
tg3_disable_nvram_access(tp);
tg3_nvram_unlock(tp);
} else {
tp->tg3_flags &= ~(TG3_FLAG_NVRAM | TG3_FLAG_NVRAM_BUFFERED);
@ -8640,10 +8642,10 @@ static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val)
if (ret == 0)
*val = swab32(tr32(NVRAM_RDDATA));
tg3_nvram_unlock(tp);
tg3_disable_nvram_access(tp);
tg3_nvram_unlock(tp);
return ret;
}
@ -8728,6 +8730,10 @@ static int tg3_nvram_write_block_unbuffered(struct tg3 *tp, u32 offset, u32 len,
offset = offset + (pagesize - page_off);
/* Nvram lock released by tg3_nvram_read() above,
* so need to get it again.
*/
tg3_nvram_lock(tp);
tg3_enable_nvram_access(tp);
/*