netdev - [PATCH net-next 4/7] qlcnic: fix initial number of msix entries in adapter.

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Message-Id: <1308256659-19895-4-git-send-email-anirban.chakraborty@qlogic.com>
Date:	Thu, 16 Jun 2011 13:37:35 -0700
From:	Anirban Chakraborty <anirban.chakraborty@...gic.com>
To:	netdev@...r.kernel.org
Cc:	David Miller <davem@...emloft.net>,
	Sucheta Chakraborty <sucheta.chakraborty@...gic.com>
Subject: [PATCH net-next 4/7] qlcnic: fix initial number of msix entries in adapter.

From: Sucheta Chakraborty <sucheta.chakraborty@...gic.com>

Calculation of number of MSI-X vectors was wrong on uniprocessor
systems.

Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@...gic.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@...gic.com>
---
 drivers/net/qlcnic/qlcnic.h      |    1 -
 drivers/net/qlcnic/qlcnic_main.c |    6 ++----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index e5bb332..58d7616 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -900,7 +900,6 @@ struct qlcnic_ipaddr {
 	((adapter)->flags & (QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED))
 
 #define QLCNIC_DEF_NUM_STS_DESC_RINGS	4
-#define QLCNIC_MIN_NUM_RSS_RINGS	2
 #define QLCNIC_MSIX_TBL_SPACE		8192
 #define QLCNIC_PCI_REG_MSIX_TBL 	0x44
 #define QLCNIC_MSIX_TBL_PGSIZE		4096
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index aa94e86..8c07c4e 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -418,10 +418,8 @@ qlcnic_setup_intr(struct qlcnic_adapter *adapter)
 	int num_msix;
 
 	if (adapter->msix_supported) {
-		num_msix = (num_online_cpus() >=
-			QLCNIC_DEF_NUM_STS_DESC_RINGS) ?
-			QLCNIC_DEF_NUM_STS_DESC_RINGS :
-			QLCNIC_MIN_NUM_RSS_RINGS;
+		num_msix = rounddown_pow_of_two(min_t(int, num_online_cpus(),
+				QLCNIC_DEF_NUM_STS_DESC_RINGS));
 	} else
 		num_msix = 1;
 
-- 
1.7.4.1

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