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IB/mad: Use krealloc() to resize snoop table 

Use krealloc() instead of kmalloc() followed by memcpy() when resizing
the MAD module's snoop table.

Also put parentheses around the new table size to avoid calculating
the wrong size to allocate, which fixes a bug pointed out by Haven
Hash <haven.hash@isilon.com>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2008-10-14 14:05:36 -07:00
parent f6bccf6954
commit 528051746b
1 changed files with 5 additions and 9 deletions
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14
drivers/infiniband/core/mad.c
View File

@ -406,19 +406,15 @@ static int register_snoop_agent(struct ib_mad_qp_info *qp_info,
if (i == qp_info->snoop_table_size) { if (i == qp_info->snoop_table_size) {
/* Grow table. */ /* Grow table. */
new_snoop_table = kmalloc(sizeof mad_snoop_priv * new_snoop_table = krealloc(qp_info->snoop_table,
qp_info->snoop_table_size + 1, sizeof mad_snoop_priv *
GFP_ATOMIC); (qp_info->snoop_table_size + 1),
GFP_ATOMIC);
if (!new_snoop_table) { if (!new_snoop_table) {
i = -ENOMEM; i = -ENOMEM;
goto out; goto out;
} }
if (qp_info->snoop_table) {
memcpy(new_snoop_table, qp_info->snoop_table,
sizeof mad_snoop_priv *
qp_info->snoop_table_size);
kfree(qp_info->snoop_table);
}
qp_info->snoop_table = new_snoop_table; qp_info->snoop_table = new_snoop_table;
qp_info->snoop_table_size++; qp_info->snoop_table_size++;
} }