--- s2-liplianin/linux/drivers/media/dvb/mantis/mantis_ca.c	2008-12-13 18:19:38.000000000 +0100
+++ mantis/linux/drivers/media/dvb/mantis/mantis_ca.c	2008-12-14 13:43:01.000000000 +0100
@@ -160,6 +160,12 @@
 	ca->en50221.poll_slot_status	= mantis_slot_status;
 	ca->en50221.data		= ca;
 
+	mutex_init(&ca->ca_lock);
+
+	init_waitqueue_head(&ca->hif_data_wq);
+	init_waitqueue_head(&ca->hif_opdone_wq);
+	init_waitqueue_head(&ca->hif_write_wq);
+
 	dprintk(verbose, MANTIS_ERROR, 1, "Registering EN50221 device");
 	if ((result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1)) != 0) {
 		dprintk(verbose, MANTIS_ERROR, 1, "EN50221: Initialization failed");
--- s2-liplianin/linux/drivers/media/dvb/mantis/mantis_hif.c	2008-12-13 18:19:38.000000000 +0100
+++ mantis/linux/drivers/media/dvb/mantis/mantis_hif.c	2008-12-14 13:43:01.000000000 +0100
@@ -75,6 +92,7 @@
 	u32 hif_addr = 0, data, count = 4;
 
 	dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num);
+	mutex_lock(&ca->ca_lock);
 	hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 	hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
 	hif_addr |=  MANTIS_HIF_STATUS;
@@ -87,9 +105,11 @@
 
 	if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num);
+		mutex_unlock(&ca->ca_lock);
 		return -EREMOTEIO;
 	}
 	data = mmread(MANTIS_GPIF_DIN);
+	mutex_unlock(&ca->ca_lock);
 	dprintk(verbose, MANTIS_DEBUG, 1, "Mem Read: 0x%02x", data);
 	return (data >> 24) & 0xff;
 }
@@ -101,6 +121,7 @@
 	u32 hif_addr = 0;
 
 	dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num);
+	mutex_lock(&ca->ca_lock);
 	hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
 	hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 	hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
@@ -113,9 +134,11 @@
 
 	if (mantis_hif_write_wait(ca) != 0) {
 		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
+		mutex_unlock(&ca->ca_lock);
 		return -EREMOTEIO;
 	}
 	dprintk(verbose, MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)", data, addr);
+	mutex_unlock(&ca->ca_lock);
 
 	return 0;
 }
@@ -126,6 +149,7 @@
 	u32 data, hif_addr = 0;
 
 	dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num);
+	mutex_lock(&ca->ca_lock);
 	hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 	hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
 	hif_addr |=  MANTIS_HIF_STATUS;
@@ -138,11 +162,13 @@
 
 	if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
+		mutex_unlock(&ca->ca_lock);
 		return -EREMOTEIO;
 	}
 	data = mmread(MANTIS_GPIF_DIN);
 	dprintk(verbose, MANTIS_DEBUG, 1, "I/O Read: 0x%02x", data);
 	udelay(50);
+	mutex_unlock(&ca->ca_lock);
 
 	return (u8) data;
 }
@@ -153,6 +179,7 @@
 	u32 hif_addr = 0;
 
 	dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num);
+	mutex_lock(&ca->ca_lock);
 	hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 	hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
 	hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
@@ -164,9 +191,11 @@
 	
 	if (mantis_hif_write_wait(ca) != 0) {
 		dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
+		mutex_unlock(&ca->ca_lock);
 		return -EREMOTEIO;
 	}
 	dprintk(verbose, MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)", data, addr);
+	mutex_unlock(&ca->ca_lock);
 	udelay(50);
 
 	return 0;
@@ -180,10 +209,8 @@
 
 	slot[0].slave_cfg = 0x70773028;
 	dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num);
-	init_waitqueue_head(&ca->hif_data_wq);
-	init_waitqueue_head(&ca->hif_opdone_wq);
-	init_waitqueue_head(&ca->hif_write_wq);
 
+	mutex_lock(&ca->ca_lock);
 	irqcfg = mmread(MANTIS_GPIF_IRQCFG);
 	irqcfg = MANTIS_MASK_BRRDY	|
 		 MANTIS_MASK_WRACK	|
@@ -193,6 +220,7 @@
 		 MANTIS_MASK_OVFLW;
 
 	mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
+	mutex_unlock(&ca->ca_lock);
 
 	return 0;
 }
@@ -203,7 +231,9 @@
 	u32 irqcfg;
 
 	dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num);
+	mutex_lock(&ca->ca_lock);
 	irqcfg = mmread(MANTIS_GPIF_IRQCFG);
 	irqcfg &= ~MANTIS_MASK_BRRDY;
 	mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
+	mutex_unlock(&ca->ca_lock);
 }
--- s2-liplianin/linux/drivers/media/dvb/mantis/mantis_link.h	2008-12-13 18:19:38.000000000 +0100
+++ mantis/linux/drivers/media/dvb/mantis/mantis_link.h	2008-12-14 13:43:01.000000000 +0100
@@ -21,6 +21,7 @@
 #ifndef __MANTIS_LINK_H
 #define __MANTIS_LINK_H
 
+#include <linux/mutex.h>
 #include <linux/workqueue.h>
 #include "dvb_ca_en50221.h"
 
@@ -61,6 +62,7 @@
 	void				*ca_priv;
 
 	struct dvb_ca_en50221		en50221;
+	struct mutex			ca_lock;
 };
 
 /* CA */