linux-kernel - [2.6 patch] infiniband/hw/nes/nes

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Date:	Wed, 20 Feb 2008 00:59:00 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	flatif@...effect.com, gstreiff@...effect.com
Cc:	general@...ts.openfabrics.org, linux-kernel@...r.kernel.org
Subject: [2.6 patch] infiniband/hw/nes/nes_verbs.c: fix off-by-one

This patch fixes an off-by-one spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@...nel.org>

---

 drivers/infiniband/hw/nes/nes_verbs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6/drivers/infiniband/hw/nes/nes_verbs.c.old	2008-02-20 00:20:47.000000000 +0200
+++ linux-2.6/drivers/infiniband/hw/nes/nes_verbs.c	2008-02-20 00:21:09.000000000 +0200
@@ -916,33 +916,33 @@ static struct ib_pd *nes_alloc_pd(struct
 	if (!nespd) {
 		nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 		return ERR_PTR(-ENOMEM);
 	}
 
 	nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
 			nespd, nesvnic->nesibdev->ibdev.name);
 
 	nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
 
 	if (context) {
 		nesucontext = to_nesucontext(context);
 		nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
 				NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
 		nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
 				nespd->mmap_db_index, nespd->pd_id);
-		if (nespd->mmap_db_index > NES_MAX_USER_DB_REGIONS) {
+		if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
 			nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
 			nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 			kfree(nespd);
 			return ERR_PTR(-ENOMEM);
 		}
 
 		uresp.pd_id = nespd->pd_id;
 		uresp.mmap_db_index = nespd->mmap_db_index;
 		if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
 			nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
 			kfree(nespd);
 			return ERR_PTR(-EFAULT);
 		}
 
 		set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
 		nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;

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