diff --git a/QualcommWifi/QualcommWifi.cpp b/QualcommWifi/QualcommWifi.cpp
index 36f945d..abd7a6d 100644
--- a/QualcommWifi/QualcommWifi.cpp
+++ b/QualcommWifi/QualcommWifi.cpp
@@ -532,7 +532,8 @@ bool QualcommWifi::start(IOService *provider) {
     }
 
     UInt16 pciCommand = fPciDevice->configRead16(kIOPCIConfigCommand);
-    pciCommand |= (kIOPCICommandMemorySpace | kIOPCICommandBusMaster);
+    pciCommand |= kIOPCICommandMemorySpace;
+    pciCommand &= ~kIOPCICommandBusMaster; // Protection absolue contre tout accès DMA non configuré sur AMD-Vi
     fPciDevice->configWrite16(kIOPCIConfigCommand, pciCommand);
 
     fBar0Map = fPciDevice->mapDeviceMemoryWithRegister(kIOPCIConfigBaseAddress0);
@@ -543,15 +544,6 @@ bool QualcommWifi::start(IOService *provider) {
     }
     fBar0Virt = (volatile void *)fBar0Map->getVirtualAddress();
 
-    UInt32 socHwVer = socRead32(TCSR_SOC_HW_VERSION);
-    UInt32 major = (socHwVer & TCSR_SOC_HW_VERSION_MAJOR_MASK) >> TCSR_SOC_HW_VERSION_MAJOR_SHIFT;
-    UInt32 minor = (socHwVer & TCSR_SOC_HW_VERSION_MINOR_MASK);
-    IOLog("QualcommWifi: WCN7850 HW v%u.%u detecte (0x%08x)\n", major, minor, socHwVer);
-
-    setProperty("SoC_Version", socHwVer, 32);
-    setProperty("SoC_Major", major, 32);
-    setProperty("SoC_Minor", minor, 32);
-
     UInt32 mhiStatus = read32(ATH12K_MHI_MHISTATUS);
     UInt32 mhiCtrl = read32(ATH12K_MHI_MHICTRL);
     UInt32 bhiOff = read32(ATH12K_MHI_BHIOFF);
@@ -730,37 +722,8 @@ IOReturn QualcommWifi::getPOWER(IO80211SkywalkInterface *iface, apple80211_power
 
 IOReturn QualcommWifi::setPOWER(IO80211SkywalkInterface *iface, apple80211_power_data *pwr) {
     int val = (pwr && pwr->power_state[0]) ? 1 : 0;
-    if (val == 1 && !fFirmwareLoaded && fPciDevice) {
-        if (allocDmaContext(ATH12K_DMA_TEST_RING_SIZE)) {
-            setProperty("DMA_PhysAddr", (uint64_t)fDmaPhysAddr, 64);
-
-            int msiIndex = -1;
-            for (int i = 0; ; i++) {
-                int intrType = 0;
-                if (fPciDevice->getInterruptType(i, &intrType) != kIOReturnSuccess) {
-                    break;
-                }
-                if (intrType & kIOInterruptTypePCIMessaged) {
-                    msiIndex = i;
-                    break;
-                }
-            }
-
-            IOWorkLoop *workLoop = getWorkLoop();
-            if (msiIndex >= 0 && workLoop && !fInterruptSource) {
-                fInterruptSource = IOInterruptEventSource::interruptEventSource(
-                    this, &QualcommWifi::interruptOccurred, fPciDevice, msiIndex);
-                if (fInterruptSource && workLoop->addEventSource(fInterruptSource) == kIOReturnSuccess) {
-                    fInterruptSource->enable();
-                    IOLog("QualcommWifi: MSI index %d actif.\n", msiIndex);
-                }
-            }
-
-            if (loadBhiFirmware()) {
-                fFirmwareLoaded = true;
-            }
-        }
-    }
+    fLinkActive = (val == 1);
+    IOLog("QualcommWifi: setPOWER invoqué par airportd (val=%d, fLinkActive=%d)\n", val, fLinkActive);
     return (IOReturn)handleApple80211Request(APPLE80211_IOC_POWER, val, pwr);
 }
 
@@ -928,6 +891,10 @@ SInt32 QualcommWifi::handleApple80211Request(unsigned int req_type, int req_val,
             return 0;
         }
         case APPLE80211_IOC_SCAN_RESULT: {
+            if (req_data) {
+                *(void **)req_data = nullptr;
+            }
+            fScanInProgress = false;
             return 0;
         }
         case APPLE80211_IOC_POWER: {