linux-kernel - [PATCH 4.7 11/41] qed: Fix setting/clearing bit in completion bitmap

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Date:	Sun, 14 Aug 2016 22:38:37 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Manish Chopra <manish.chopra@...gic.com>,
	Yuval Mintz <Yuval.Mintz@...gic.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.7 11/41] qed: Fix setting/clearing bit in completion bitmap

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Manish Chopra <manish.chopra@...gic.com>

[ Upstream commit 59d3f1ceb69b54569685d0c34dff16a1e0816b19 ]

Slowpath completion handling is incorrectly changing
SPQ_RING_SIZE bits instead of a single one.

Fixes: 76a9a3642a0b ("qed: fix handling of concurrent ramrods")
Signed-off-by: Manish Chopra <manish.chopra@...gic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@...gic.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/qlogic/qed/qed_spq.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/qlogic/qed/qed_spq.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_spq.c
@@ -809,13 +809,12 @@ int qed_spq_completion(struct qed_hwfn *
 			 * in a bitmap and increasing the chain consumer only
 			 * for the first successive completed entries.
 			 */
-			bitmap_set(p_spq->p_comp_bitmap, pos, SPQ_RING_SIZE);
+			__set_bit(pos, p_spq->p_comp_bitmap);
 
 			while (test_bit(p_spq->comp_bitmap_idx,
 					p_spq->p_comp_bitmap)) {
-				bitmap_clear(p_spq->p_comp_bitmap,
-					     p_spq->comp_bitmap_idx,
-					     SPQ_RING_SIZE);
+				__clear_bit(p_spq->comp_bitmap_idx,
+					    p_spq->p_comp_bitmap);
 				p_spq->comp_bitmap_idx++;
 				qed_chain_return_produced(&p_spq->chain);
 			}