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bnxt_en: Fix possible BUG() condition when calling pci_disable_msix().

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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: 41e8d79837 ("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>
This commit is contained in:
Michael Chan 2019-05-22 19:12:55 -04:00 committed by David S. Miller
parent 296d5b5416
commit 1b3f0b75c3
4 changed files with 10 additions and 9 deletions
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13
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -7618,22 +7618,23 @@ 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);
@ -8532,7 +8533,7 @@ 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) &&

2
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -1790,7 +1790,7 @@ 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 *);

2
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -831,7 +831,7 @@ static int bnxt_set_channels(struct net_device *dev,
*/
}
} else {
rc = bnxt_reserve_rings(bp);
rc = bnxt_reserve_rings(bp, true);
}
return rc;

2
drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
View File

@ -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) {