[PATCH] sfc: Use kcalloc instead of kzalloc to allocate array
From: Thomas Meyer <hidden>
Date: 2011-12-03 08:28:35
Also in:
lkml
The advantage of kcalloc is, that will prevent integer overflows which could result from the multiplication of number of elements and size and it is also a bit nicer to read. The semantic patch that makes this change is available in https://lkml.org/lkml/2011/11/25/107 Signed-off-by: Thomas Meyer <redacted> --- diff -u -p a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
--- a/drivers/net/ethernet/sfc/rx.c 2011-11-13 11:07:36.306977044 +0100
+++ b/drivers/net/ethernet/sfc/rx.c 2011-11-28 19:53:10.346917167 +0100@@ -669,7 +669,7 @@ int efx_probe_rx_queue(struct efx_rx_que rx_queue->ptr_mask); /* Allocate RX buffers */ - rx_queue->buffer = kzalloc(entries * sizeof(*rx_queue->buffer), + rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer), GFP_KERNEL); if (!rx_queue->buffer) return -ENOMEM;
diff -u -p a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
--- a/drivers/net/ethernet/sfc/selftest.c 2011-11-13 11:07:36.306977044 +0100
+++ b/drivers/net/ethernet/sfc/selftest.c 2011-11-28 19:53:09.640237232 +0100@@ -503,8 +503,8 @@ efx_test_loopback(struct efx_tx_queue *t /* Determine how many packets to send */ state->packet_count = efx->txq_entries / 3; state->packet_count = min(1 << (i << 2), state->packet_count); - state->skbs = kzalloc(sizeof(state->skbs[0]) * - state->packet_count, GFP_KERNEL); + state->skbs = kcalloc(state->packet_count, + sizeof(state->skbs[0]), GFP_KERNEL); if (!state->skbs) return -ENOMEM; state->flush = false;
diff -u -p a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
--- a/drivers/net/ethernet/sfc/tx.c 2011-11-13 11:07:36.313643816 +0100
+++ b/drivers/net/ethernet/sfc/tx.c 2011-11-28 19:53:08.056874176 +0100@@ -468,7 +468,7 @@ int efx_probe_tx_queue(struct efx_tx_que tx_queue->queue, efx->txq_entries, tx_queue->ptr_mask); /* Allocate software ring */ - tx_queue->buffer = kzalloc(entries * sizeof(*tx_queue->buffer), + tx_queue->buffer = kcalloc(entries, sizeof(*tx_queue->buffer), GFP_KERNEL); if (!tx_queue->buffer) return -ENOMEM;