tg3: power down device only on SYSTEM_POWER_OFF

[ Upstream commit 9fc3bc7643341dc5be7d269f3d3dbe441d8d7ac3 ]

Dell R650xs servers hangs on reboot if tg3 driver calls
tg3_power_down.

This happens only if network adapters (BCM5720 for R650xs) were
initialized using SNP (e.g. by booting ipxe.efi).

The actual problem is on Dell side, but this fix allows servers
to come back alive after reboot.

Signed-off-by: George Shuklin <george.shuklin@gmail.com>
Fixes: 2ca1c94ce0b6 ("tg3: Disable tg3 device on system reboot to avoid triggering AER")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231103115029.83273-1-george.shuklin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 9609041016776e989e2a37a864da1699ef01441b..85570e40c8e9b3758fb3dd883e0acd68bb5dfbad 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -18086,7 +18086,8 @@ static void tg3_shutdown(struct pci_dev *pdev)
        if (netif_running(dev))
                dev_close(dev);
 
-       tg3_power_down(tp);
+       if (system_state == SYSTEM_POWER_OFF)
+               tg3_power_down(tp);
 
        rtnl_unlock();