diff -r 252d9b812f7d sys/src/9/pc/etheriwl.c
--- a/sys/src/9/pc/etheriwl.c	Mon Mar 01 17:24:54 2021 +0100
+++ b/sys/src/9/pc/etheriwl.c	Fri Mar 05 01:50:30 2021 +0100
@@ -694,6 +694,7 @@
 
 #define csr32r(c, r)	(*((c)->nic+((r)/4)))
 #define csr32w(c, r, v)	(*((c)->nic+((r)/4)) = (v))
+#define csr8w(c, r, v) (((u8int*)(c)->nic)[r] = (v))
 
 static uint
 get16(uchar *p){
@@ -1088,6 +1089,23 @@
 		nicunlock(ctlr);
 	}
 
+	if(ctlr->pdev->did == 0x08b1 || ctlr->pdev->did == 0x08b2){
+		print("host_interrupt_operation_mode work around!\n");
+		if((err = niclock(ctlr)) != nil)
+			return err;
+		prphread(ctlr, 0xa04068);	/* IWM_OSC */
+		prphread(ctlr, 0xa04068);	/* IWM_OSC */
+		nicunlock(ctlr);
+
+		/* iwm_set_bits_prph(sc, IWM_OSC_CLK, IWM_OSC_CLK_FORCE_CONTROL); */
+		prphwrite(ctlr, 0xa04068, prphread(ctlr, 0xa04068) | 0x8);
+		if((err = niclock(ctlr)) != nil)
+			return err;
+		prphread(ctlr, 0xa04068);	/* IWM_OSC */
+		prphread(ctlr, 0xa04068);	/* IWM_OSC */
+		nicunlock(ctlr);
+	}
+
 	if(ctlr->family < 8000){
 		if((err = niclock(ctlr)) != nil)
 			return err;
@@ -1883,6 +1901,11 @@
 			FhRxConfigSingleFrame |
 			(Nrxlog << FhRxConfigNrbdShift));
 
+		/* IWM_CSR_INT_COALESCING */
+		csr8w(ctlr, 0x004, 0x40);
+		if(ctlr->pdev->did == 0x08b1 || ctlr->pdev->did == 0x08b2)
+			csr32w(ctlr, 0x004, csr32r(ctlr, 0x004) | (1UL<<31));
+
 		csr32w(ctlr, FhRxWptr, (Nrx-1) & ~7);
 	}