mpfs/ethernet: Move txtimeout from HPWORK to LPWORK

- Remove useless CONFIG_MPFS_ETHMAC_LPWORK; use LPWORK by default if HPWORK is not defined
- Always use LPWORK for timeouts; this makes very lengthy operations such as re-initializing PHY.

Signed-off-by: Jukka Laitinen <[email protected]>

Author: jlaitine

arch/risc-v/src/mpfs/Kconfig

@@ -907,13 +907,6 @@ config MPFS_ETHMAC_HPWORK
 	---help---
 		Select HPWORK workqueue for eth ISR work
 
-config MPFS_ETHMAC_LPWORK
-	bool "Use LP workqueue"
-	default n
-	depends on MPFS_ETHMAC
-	---help---
-		Select LPWORK workqueue for eth ISR work
-
 config MPFS_ETHMAC_MDC_CLOCK_SOURCE_HZ
 	int "MDC Clock Source (Hz)"
 	default 125000000

arch/risc-v/src/mpfs/mpfs_ethernet.c

@@ -100,10 +100,8 @@
 
 #  if defined(CONFIG_MPFS_ETHMAC_HPWORK)
 #    define ETHWORK HPWORK
-#  elif defined(CONFIG_MPFS_ETHMAC_LPWORK)
-#    define ETHWORK LPWORK
 #  else
-#    define ETHWORK HPWORK
+#    define ETHWORK LPWORK
 #  endif
 #endif
 
@@ -274,6 +272,7 @@ struct mpfs_ethmac_s
   struct wdog_s rxtimeout;                       /* RX timeout timer */
   struct work_s irqwork;                         /* For deferring interrupt work to the work queue */
   struct work_s pollwork;                        /* For deferring poll work to the work queue */
+  struct work_s timeoutwork;                     /* For managing timeouts */
 
   /* This holds the information visible to the NuttX network */
 
@@ -2913,7 +2912,7 @@ static void mpfs_txtimeout_expiry(wdparm_t arg)
 
   /* Schedule to perform the TX timeout processing on the worker thread. */
 
-  work_queue(ETHWORK, &priv->irqwork, mpfs_txtimeout_work, priv, 0);
+  work_queue(LPWORK, &priv->timeoutwork, mpfs_txtimeout_work, priv, 0);
 }
 
 /****************************************************************************