This is a note to let you know that I've just added the patch titled
bnxt_en: Need to unconditionally shut down RoCE in bnxt_shutdown
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: bnxt_en-need-to-unconditionally-shut-down-roce-in-bnxt_shutdown.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Fri Feb 23 11:45:09 CET 2018
From: Ray Jui ray.jui@broadcom.com Date: Fri, 1 Dec 2017 03:13:02 -0500 Subject: bnxt_en: Need to unconditionally shut down RoCE in bnxt_shutdown
From: Ray Jui ray.jui@broadcom.com
[ Upstream commit a7f3f939dd7d8398acebecd1ceb2e9e7ffbe91d2 ]
The current 'bnxt_shutdown' implementation only invokes 'bnxt_ulp_shutdown' to shut down RoCE in the case when the system is in the path of power off (SYSTEM_POWER_OFF). While this may work in most cases, it does not work in the smart NIC case, when Linux 'reboot' command is initiated from the Linux that runs on the ARM cores of the NIC card. In this particular case, Linux 'reboot' results in a system 'L3' level reset where the entire ARM and associated subsystems are being reset, but at the same time, Nitro core is being kept in sane state (to allow external PCIe connected servers to continue to work). Without properly shutting down RoCE and freeing all associated resources, it results in the ARM core to hang immediately after the 'reboot'
By always invoking 'bnxt_ulp_shutdown' in 'bnxt_shutdown', it fixes the above issue
Fixes: 0efd2fc65c92 ("bnxt_en: Add a callback to inform RDMA driver during PCI shutdown.")
Signed-off-by: Ray Jui ray.jui@broadcom.com Signed-off-by: Michael Chan michael.chan@broadcom.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -8218,8 +8218,9 @@ static void bnxt_shutdown(struct pci_dev if (netif_running(dev)) dev_close(dev);
+ bnxt_ulp_shutdown(bp); + if (system_state == SYSTEM_POWER_OFF) { - bnxt_ulp_shutdown(bp); bnxt_clear_int_mode(bp); pci_wake_from_d3(pdev, bp->wol); pci_set_power_state(pdev, PCI_D3hot);
Patches currently in stable-queue which might be from ray.jui@broadcom.com are
queue-4.14/bnxt_en-need-to-unconditionally-shut-down-roce-in-bnxt_shutdown.patch