From: Roland Dreier Date: Mon, 27 Jun 2005 21:36:47 +0000 (-0700) Subject: [PATCH] IB: Fix pack/unpack when size_bits == 64 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=48442962ebccec92d8a65f465420423cd2ce0bc8;p=openwrt%2Fstaging%2Fblogic.git [PATCH] IB: Fix pack/unpack when size_bits == 64 Fix handling of fields with size_bits == 64. Pointed out by Hal Rosenstock. Signed-off-by: Roland Dreier Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/infiniband/core/packer.c b/drivers/infiniband/core/packer.c index 5f15feffeae2..eb5ff54c10d7 100644 --- a/drivers/infiniband/core/packer.c +++ b/drivers/infiniband/core/packer.c @@ -96,7 +96,7 @@ void ib_pack(const struct ib_field *desc, else val = 0; - mask = cpu_to_be64(((1ull << desc[i].size_bits) - 1) << shift); + mask = cpu_to_be64((~0ull >> (64 - desc[i].size_bits)) << shift); addr = (__be64 *) ((__be32 *) buf + desc[i].offset_words); *addr = (*addr & ~mask) | (cpu_to_be64(val) & mask); } else { @@ -176,7 +176,7 @@ void ib_unpack(const struct ib_field *desc, __be64 *addr; shift = 64 - desc[i].offset_bits - desc[i].size_bits; - mask = ((1ull << desc[i].size_bits) - 1) << shift; + mask = (~0ull >> (64 - desc[i].size_bits)) << shift; addr = (__be64 *) buf + desc[i].offset_words; val = (be64_to_cpup(addr) & mask) >> shift; value_write(desc[i].struct_offset_bytes,