From: Shannon Nelson Date: Sat, 28 Sep 2013 07:14:09 +0000 (+0000) Subject: i40e: check vsi ptrs before dumping them X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59072ba139549ff9850585fde3ec2935addfbff8;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git i40e: check vsi ptrs before dumping them Make sure there really are rings and queues before trying to dump information in them. Signed-off-by: Shannon Nelson Signed-off-by: Jesse Brandeburg Tested-by: Kavindya Deegala Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c index 246b177ee432..ef4cb1cf31f2 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c +++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c @@ -234,26 +234,33 @@ static ssize_t i40e_dbg_dump_write(struct file *filp, memcpy(p, vsi, len); p += len; - len = (sizeof(struct i40e_q_vector) - * vsi->num_q_vectors); - memcpy(p, vsi->q_vectors, len); - p += len; - - len = (sizeof(struct i40e_ring) * vsi->num_queue_pairs); - memcpy(p, vsi->tx_rings, len); - p += len; - memcpy(p, vsi->rx_rings, len); - p += len; + if (vsi->num_q_vectors) { + len = (sizeof(struct i40e_q_vector) + * vsi->num_q_vectors); + memcpy(p, vsi->q_vectors, len); + p += len; + } - for (i = 0; i < vsi->num_queue_pairs; i++) { - len = sizeof(struct i40e_tx_buffer); - memcpy(p, vsi->tx_rings[i]->tx_bi, len); + if (vsi->num_queue_pairs) { + len = (sizeof(struct i40e_ring) * + vsi->num_queue_pairs); + memcpy(p, vsi->tx_rings, len); + p += len; + memcpy(p, vsi->rx_rings, len); p += len; } - for (i = 0; i < vsi->num_queue_pairs; i++) { + + if (vsi->tx_rings[0]) { + len = sizeof(struct i40e_tx_buffer); + for (i = 0; i < vsi->num_queue_pairs; i++) { + memcpy(p, vsi->tx_rings[i]->tx_bi, len); + p += len; + } len = sizeof(struct i40e_rx_buffer); - memcpy(p, vsi->rx_rings[i]->rx_bi, len); - p += len; + for (i = 0; i < vsi->num_queue_pairs; i++) { + memcpy(p, vsi->rx_rings[i]->rx_bi, len); + p += len; + } } /* macvlan filter list */