net/i40e/base: correct global reset timeout calculation

The wait time for Global Reset Ready steady state is calculated based on
the GLGEN_RSTCTL.GRSTDEL value. However, current impelementation multiplied
that value by 20 as a workaround for an issue in SOC platforms.
This resulted in the maximum GLGEN_RSTCTL.GRSTDEL timeout of 6.5 seconds
becoming 130 seconds, which is so long that the VMkernel watchdog thinks
the kernel is frozen and triggers a PSOD.

Cc: stable@dpdk.org
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Beilei Xing <beilei.xing@intel.com>

diff --git a/drivers/net/i40e/base/i40e_common.c b/drivers/net/i40e/base/i40e_common.c
index 0affa98..0eb369f 100644 (file)
--- a/drivers/net/i40e/base/i40e_common.c
+++ b/drivers/net/i40e/base/i40e_common.c
@@ -1342,7 +1342,7 @@ enum i40e_status_code i40e_pf_reset(struct i40e_hw *hw)
                        I40E_GLGEN_RSTCTL_GRSTDEL_MASK) >>
                        I40E_GLGEN_RSTCTL_GRSTDEL_SHIFT;
 
-       grst_del = grst_del * 20;
+       grst_del = min(grst_del * 20, 160U);
 
        for (cnt = 0; cnt < grst_del; cnt++) {
                reg = rd32(hw, I40E_GLGEN_RSTAT);