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| author | Michael Chan <mchan@broadcom.com> | 2005-12-13 21:08:21 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-12-13 21:08:21 -0800 |
| commit | 381291b7d3e17ac966498312dc571dcca1b93efc (patch) | |
| tree | 619ab88cbec0112674f72b3a8c6b3aae1bacd69a | |
| parent | 65ab592dc5b34caebabfe1340e7c18f52a785079 (diff) | |
| download | kernel_samsung_smdk4412-381291b7d3e17ac966498312dc571dcca1b93efc.zip kernel_samsung_smdk4412-381291b7d3e17ac966498312dc571dcca1b93efc.tar.gz kernel_samsung_smdk4412-381291b7d3e17ac966498312dc571dcca1b93efc.tar.bz2 | |
[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>
| -rw-r--r-- | drivers/net/tg3.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 47bd4a3..dabc39b 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -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); /* |