tg3: power down device only on SYSTEM_POWER_OFF

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>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 5665d0c3668fb149a26e7e1d27d2df52885d09eb..9a8d87fe25fff8f7f9f104af45e084004195a2f7 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -18127,7 +18127,8 @@ 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();