5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Saravanan Vajravel saravanan.vajravel@broadcom.com
[ Upstream commit 5311598f7f3293683cdc761df71ae3469327332c ]
After successful PCIe AER recovery, FW will reset all resource reservations. If it is IF_UP, the driver will call bnxt_open() and all resources will be reserved again. It it is IF_DOWN, we should call bnxt_reserve_rings() so that we can reserve resources including RoCE resources to allow RoCE to resume after AER. Without this patch, RoCE fails to resume in this IF_DOWN scenario.
Later, if it becomes IF_UP, bnxt_open() will see that resources have been reserved and will not reserve again.
Fixes: fb1e6e562b37 ("bnxt_en: Fix AER recovery.") Reviewed-by: Somnath Kotur somnath.kotur@broadcom.com Reviewed-by: Pavan Chebbi pavan.chebbi@broadcom.com Reviewed-by: Kashyap Desai kashyap.desai@broadcom.com Signed-off-by: Saravanan Vajravel saravanan.vajravel@broadcom.com Signed-off-by: Michael Chan michael.chan@broadcom.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index f3c6a122a079a..127f7d238a041 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -13692,8 +13692,12 @@ static void bnxt_io_resume(struct pci_dev *pdev) rtnl_lock();
err = bnxt_hwrm_func_qcaps(bp); - if (!err && netif_running(netdev)) - err = bnxt_open(netdev); + if (!err) { + if (netif_running(netdev)) + err = bnxt_open(netdev); + else + err = bnxt_reserve_rings(bp, true); + }
bnxt_ulp_start(bp, err); if (!err) {