tg3: Disable multivec mode for 1 MSIX vector

For single vector MSI-X allocations, we do not want to enable
multivector modes.  This patch makes the necessary corrections.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index d4b29f4240857f25c7df9b97c81b7ba64a4f7887..b2a16b4e3caf67e7ea30f451f5c47a7ac41db4f2 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8322,7 +8322,8 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
        tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl);
        udelay(100);
 
-       if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX) {
+       if ((tp->tg3_flags2 & TG3_FLG2_USING_MSIX) &&
+               tp->irq_cnt > 1) {
                val = tr32(MSGINT_MODE);
                val |= MSGINT_MODE_MULTIVEC_EN | MSGINT_MODE_ENABLE;
                tw32(MSGINT_MODE, val);
@@ -9062,7 +9063,8 @@ static void tg3_ints_init(struct tg3 *tp)
 
        if (tp->tg3_flags2 & TG3_FLG2_USING_MSI_OR_MSIX) {
                u32 msi_mode = tr32(MSGINT_MODE);
-               if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX)
+               if ((tp->tg3_flags2 & TG3_FLG2_USING_MSIX) &&
+                   tp->irq_cnt > 1)
                        msi_mode |= MSGINT_MODE_MULTIVEC_EN;
                tw32(MSGINT_MODE, msi_mode | MSGINT_MODE_ENABLE);
        }