i40e: move I40E_FLAG_TEMP_LINK_POLLING to state field

This flag is modified outside of the RTNL lock and thus should not be
part of the pf->flags variable.

Use a state bit instead, so that we can use atomic bit operations.

This is part of a larger effort to remove cmpxchg64 in
i40e_set_priv_flags()

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 3863356..1ffe802 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -166,6 +166,7 @@ enum i40e_state_t {
        __I40E_VF_DISABLE,
        __I40E_MACVLAN_SYNC_PENDING,
        __I40E_UDP_FILTER_SYNC_PENDING,
+       __I40E_TEMP_LINK_POLLING,
        /* This must be last as it determines the size of the BITMAP */
        __I40E_STATE_SIZE__,
 };
@@ -534,7 +535,7 @@ struct i40e_pf {
 #define I40E_FLAG_VEB_STATS_ENABLED            BIT_ULL(17)
 #define I40E_FLAG_LINK_POLLING_ENABLED         BIT_ULL(18)
 #define I40E_FLAG_TRUE_PROMISC_SUPPORT         BIT_ULL(19)
-#define I40E_FLAG_TEMP_LINK_POLLING            BIT_ULL(20)
+/* Gap for BIT_ULL(20) */
 #define I40E_FLAG_LEGACY_RX                    BIT_ULL(21)
 #define I40E_FLAG_PTP                          BIT_ULL(22)
 #define I40E_FLAG_IWARP_ENABLED                        BIT_ULL(23)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index a478153..307f5bf 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8432,13 +8432,12 @@ static void i40e_link_event(struct i40e_pf *pf)
 
        /* On success, disable temp link polling */
        if (status == I40E_SUCCESS) {
-               if (pf->flags & I40E_FLAG_TEMP_LINK_POLLING)
-                       pf->flags &= ~I40E_FLAG_TEMP_LINK_POLLING;
+               clear_bit(__I40E_TEMP_LINK_POLLING, pf->state);
        } else {
                /* Enable link polling temporarily until i40e_get_link_status
                 * returns I40E_SUCCESS
                 */
-               pf->flags |= I40E_FLAG_TEMP_LINK_POLLING;
+               set_bit(__I40E_TEMP_LINK_POLLING, pf->state);
                dev_dbg(&pf->pdev->dev, "couldn't get link state, status: %d\n",
                        status);
                return;
@@ -8490,7 +8489,7 @@ static void i40e_watchdog_subtask(struct i40e_pf *pf)
        pf->service_timer_previous = jiffies;
 
        if ((pf->flags & I40E_FLAG_LINK_POLLING_ENABLED) ||
-           (pf->flags & I40E_FLAG_TEMP_LINK_POLLING))
+           test_bit(__I40E_TEMP_LINK_POLLING, pf->state))
                i40e_link_event(pf);
 
        /* Update the stats for active netdevs so the network stack