linux: mts: fix NAPI poll storm that pins a CPU when the NIC MSI never fires (#14)

The PS5 GbE NIC has no INTx pin and its MSI sometimes never fires after a
cold boot. The driver already works around that with a 1 Hz link-poll
watchdog that kicks NAPI by hand.

But gbe_poll() re-checks GBE_REG_ISR after completing NAPI and reschedules
itself whenever a GBE_IER_MASK cause is still latched, without ever
acknowledging (W1C) the ISR -- only the hardware handler gbe_isr() does.
When the MSI is dead gbe_isr() never runs, so the latched cause (e.g.
RX_DONE) is never cleared, the re-check stays true forever, and NAPI
reschedules itself ~30k times/s, pinning ksoftirqd on that CPU at 100%.

Acknowledge the pending causes before re-kicking so a stale, undelivered
cause can no longer spin NAPI.

While the MSI is dead also poll the rings every GBE_POLL_FALLBACK_MS (10 ms)
instead of once per second, so interactive RX latency drops from ~1 s to a
few ms; fall back to HZ as soon as real IRQs start arriving.

.config

@@ -1408,8 +1408,8 @@ CONFIG_NFT_LIMIT=m
 CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
-# CONFIG_NFT_TUNNEL is not set
-# CONFIG_NFT_QUEUE is not set
+CONFIG_NFT_TUNNEL=m
+CONFIG_NFT_QUEUE=m
 # CONFIG_NFT_QUOTA is not set
 CONFIG_NFT_REJECT=m
 CONFIG_NFT_REJECT_INET=m
@@ -2015,6 +2015,7 @@ CONFIG_PNPACPI=y
 CONFIG_BLK_DEV=y
 # CONFIG_BLK_DEV_NULL_BLK is not set
 # CONFIG_BLK_DEV_FD is not set
+CONFIG_CDROM=y
 # CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
 CONFIG_ZRAM=m
 CONFIG_ZRAM_BACKEND_LZ4=y
@@ -2132,7 +2133,6 @@ CONFIG_SCSI_PROC_FS=y
 #
 CONFIG_BLK_DEV_SD=y
 # CONFIG_CHR_DEV_ST is not set
-CONFIG_CDROM=y
 CONFIG_BLK_DEV_SR=y
 CONFIG_CHR_DEV_SG=y
 CONFIG_BLK_DEV_BSG=y
@@ -2171,7 +2171,7 @@ CONFIG_SATA_PMP=y
 # CONFIG_SATA_AHCI is not set
 # CONFIG_SATA_AHCI_PLATFORM is not set
 # CONFIG_AHCI_DWC is not set
-CONFIG_AHCI_SALINA=y
+CONFIG_AHCI_SALINA=m
 # CONFIG_SATA_INIC162X is not set
 # CONFIG_SATA_ACARD_AHCI is not set
 # CONFIG_SATA_SIL24 is not set
@@ -3121,6 +3121,7 @@ CONFIG_SENSORS_K10TEMP=m
 # CONFIG_SENSORS_CHIPCAP2 is not set
 # CONFIG_SENSORS_CORSAIR_CPRO is not set
 # CONFIG_SENSORS_CORSAIR_PSU is not set
+# CONFIG_SENSORS_DRIVETEMP is not set
 # CONFIG_SENSORS_DS620 is not set
 # CONFIG_SENSORS_DS1621 is not set
 # CONFIG_SENSORS_DELL_SMM is not set
@@ -4272,6 +4273,7 @@ CONFIG_LEDS_CLASS_MULTICOLOR=m
 CONFIG_LEDS_TRIGGERS=y
 # CONFIG_LEDS_TRIGGER_TIMER is not set
 # CONFIG_LEDS_TRIGGER_ONESHOT is not set
+# CONFIG_LEDS_TRIGGER_DISK is not set
 # CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
 # CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
 # CONFIG_LEDS_TRIGGER_CPU is not set