From: Ernesto Ramos Date: Wed, 28 Jul 2010 21:04:54 +0000 (-0500) Subject: staging: ti dspbridge: avoid errors if node handle is zero X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8df327c3904d34527b89d4881bd3ce2966f0e07f;p=linux-beck.git staging: ti dspbridge: avoid errors if node handle is zero As 'zero' can be a perfectly good id, it can be picked up as a NULL from userspace, avoid issues in API and user apps if node handle is zero. Signed-off-by: Ernesto Ramos Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/tidspbridge/pmgr/dspapi.c b/drivers/staging/tidspbridge/pmgr/dspapi.c index 6eda7c5324a8..f46aaf683e37 100644 --- a/drivers/staging/tidspbridge/pmgr/dspapi.c +++ b/drivers/staging/tidspbridge/pmgr/dspapi.c @@ -1059,7 +1059,7 @@ inline void find_node_handle(struct node_res_object **noderes, { rcu_read_lock(); *noderes = idr_find(((struct process_context *)pr_ctxt)->node_id, - (int)hnode); + (int)hnode - 1); rcu_read_unlock(); return; } @@ -1077,6 +1077,7 @@ u32 nodewrap_allocate(union trapped_args *args, void *pr_ctxt) u8 *pargs = NULL; struct dsp_nodeattrin proc_attr_in, *attr_in = NULL; struct node_res_object *node_res; + int nodeid; /* Optional argument */ if (psize) { @@ -1112,7 +1113,8 @@ u32 nodewrap_allocate(union trapped_args *args, void *pr_ctxt) attr_in, &node_res, pr_ctxt); } if (!status) { - CP_TO_USR(args->args_node_allocate.ph_node, &node_res->id, + nodeid = node_res->id + 1; + CP_TO_USR(args->args_node_allocate.ph_node, &nodeid, status, 1); if (status) { status = -EFAULT;