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| author | Robin Holt <holt@sgi.com> | 2009-02-03 18:40:59 -0600 |
|---|---|---|
| committer | Tony Luck <aegl@agluck-desktop.(none)> | 2009-02-19 11:29:31 -0800 |
| commit | 39d481cba27809598e755e184bc0d8ae1d22423e (patch) | |
| tree | 15087a039ccdb05749e099e1a1a7ae39e3887a55 /arch/ia64/include/asm | |
| parent | 334f85b647bc46ff4d27ace55aa65f44d6a2f4db (diff) | |
| download | lwn-39d481cba27809598e755e184bc0d8ae1d22423e.tar.gz lwn-39d481cba27809598e755e184bc0d8ae1d22423e.zip | |
[IA64] bte_copy of BTE_MAX_XFER trips BUG_ON.
BTE_MAX_XFER is wrong. It is one greater than the number of cache
lines the BTE is actually able to transfer. If you request a transfer
of exactly BTE_MAX_XFER size, you trip a very cryptic BUG_ON() which
should certainly be made more clear.
This patch fixes that constant and also cleans up the BUG_ON()s in
arch/ia64/sn/kernel/bte.c to test one condition per line.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <aegl@agluck-desktop.(none)>
Diffstat (limited to 'arch/ia64/include/asm')
| -rw-r--r-- | arch/ia64/include/asm/sn/bte.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/sn/bte.h b/arch/ia64/include/asm/sn/bte.h index 5efecf06c9a4..96798d2da7c2 100644 --- a/arch/ia64/include/asm/sn/bte.h +++ b/arch/ia64/include/asm/sn/bte.h @@ -39,7 +39,7 @@ /* BTE status register only supports 16 bits for length field */ #define BTE_LEN_BITS (16) #define BTE_LEN_MASK ((1 << BTE_LEN_BITS) - 1) -#define BTE_MAX_XFER ((1 << BTE_LEN_BITS) * L1_CACHE_BYTES) +#define BTE_MAX_XFER (BTE_LEN_MASK << L1_CACHE_SHIFT) /* Define hardware */ |