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authorMichael Chan <michael.chan@broadcom.com>2019-05-22 23:12:55 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-04 05:59:44 (GMT)
commit45e8cd220d74c5628941ce525f0a3481385edec8 (patch)
tree93828f0bc7e5644cafbba1fbddb74d348b456f61
parent024512262906267f810817d58ec345b8050647cb (diff)
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bnxt_en: Fix possible BUG() condition when calling pci_disable_msix().
[ Upstream commit 1b3f0b75c39f534278a895c117282014e9d0ae1f ] When making configuration changes, the driver calls bnxt_close_nic() and then bnxt_open_nic() for the changes to take effect. A parameter irq_re_init is passed to the call sequence to indicate if IRQ should be re-initialized. This irq_re_init parameter needs to be included in the bnxt_reserve_rings() call. bnxt_reserve_rings() can only call pci_disable_msix() if the irq_re_init parameter is true, otherwise it may hit BUG() because some IRQs may not have been freed yet. Fixes: 41e8d7983752 ("bnxt_en: Modify the ring reservation functions for 57500 series chips.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c13
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.h2
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c2
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c2
4 files changed, 10 insertions, 9 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0519d79..96567c7 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7514,22 +7514,23 @@ static void bnxt_clear_int_mode(struct bnxt *bp)
bp->flags &= ~BNXT_FLAG_USING_MSIX;
}
-int bnxt_reserve_rings(struct bnxt *bp)
+int bnxt_reserve_rings(struct bnxt *bp, bool irq_re_init)
{
int tcs = netdev_get_num_tc(bp->dev);
- bool reinit_irq = false;
+ bool irq_cleared = false;
int rc;
if (!bnxt_need_reserve_rings(bp))
return 0;
- if (BNXT_NEW_RM(bp) && (bnxt_get_num_msix(bp) != bp->total_irqs)) {
+ if (irq_re_init && BNXT_NEW_RM(bp) &&
+ bnxt_get_num_msix(bp) != bp->total_irqs) {
bnxt_ulp_irq_stop(bp);
bnxt_clear_int_mode(bp);
- reinit_irq = true;
+ irq_cleared = true;
}
rc = __bnxt_reserve_rings(bp);
- if (reinit_irq) {
+ if (irq_cleared) {
if (!rc)
rc = bnxt_init_int_mode(bp);
bnxt_ulp_irq_restart(bp, rc);
@@ -8428,7 +8429,7 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
return rc;
}
}
- rc = bnxt_reserve_rings(bp);
+ rc = bnxt_reserve_rings(bp, irq_re_init);
if (rc)
return rc;
if ((bp->flags & BNXT_FLAG_RFS) &&
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index cf81ace..2305e6c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1778,7 +1778,7 @@ unsigned int bnxt_get_avail_stat_ctxs_for_en(struct bnxt *bp);
unsigned int bnxt_get_max_func_cp_rings(struct bnxt *bp);
unsigned int bnxt_get_avail_cp_rings_for_en(struct bnxt *bp);
int bnxt_get_avail_msix(struct bnxt *bp, int num);
-int bnxt_reserve_rings(struct bnxt *bp);
+int bnxt_reserve_rings(struct bnxt *bp, bool irq_re_init);
void bnxt_tx_disable(struct bnxt *bp);
void bnxt_tx_enable(struct bnxt *bp);
int bnxt_hwrm_set_pause(struct bnxt *);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index adabbe9..e1460e3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -788,7 +788,7 @@ static int bnxt_set_channels(struct net_device *dev,
*/
}
} else {
- rc = bnxt_reserve_rings(bp);
+ rc = bnxt_reserve_rings(bp, true);
}
return rc;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index cf47587..bfa342a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -147,7 +147,7 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
bnxt_close_nic(bp, true, false);
rc = bnxt_open_nic(bp, true, false);
} else {
- rc = bnxt_reserve_rings(bp);
+ rc = bnxt_reserve_rings(bp, true);
}
}
if (rc) {