From c829f5f52db9bae0379b98fca2645f6ca9b0fb1e Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Tue, 29 Jan 2019 11:05:23 -0600 Subject: [PATCH] cxgb4: cxgb4_tc_u32: use struct_size() in kvzalloc() One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; struct boo entry[]; }; instance = kvzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kvzalloc(struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c index c7d2b4dc7568..02fc63fa7f25 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c @@ -444,8 +444,7 @@ struct cxgb4_tc_u32_table *cxgb4_init_tc_u32(struct adapter *adap) if (!max_tids) return NULL; - t = kvzalloc(sizeof(*t) + - (max_tids * sizeof(struct cxgb4_link)), GFP_KERNEL); + t = kvzalloc(struct_size(t, table, max_tids), GFP_KERNEL); if (!t) return NULL; -- 2.11.0