[efi] Use efi_handle_name() instead of efi_devpath_text() where applicable

Using efi_devpath_text() is marginally more efficient if we already
have the device path protocol available, but the mild increase in
efficiency is not worth compromising the clarity of the pattern:

  DBGC ( device, "THING %p %s ...", device, efi_handle_name ( device ) );

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/efi/snpnet.c

@@ -334,24 +334,24 @@ static struct net_device_operations snpnet_operations = {
 static int snpnet_pci_info ( struct efi_device *efidev, struct device *dev ) {
 	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
 	EFI_DEVICE_PATH_PROTOCOL *devpath = efidev->path;
+	EFI_HANDLE device = efidev->device;
 	struct pci_device pci;
-	EFI_HANDLE device;
+	EFI_HANDLE pci_device;
 	EFI_STATUS efirc;
 	int rc;
 
 	/* Check for presence of PCI I/O protocol */
 	if ( ( efirc = bs->LocateDevicePath ( &efi_pci_io_protocol_guid,
-					      &devpath, &device ) ) != 0 ) {
-		DBGC ( efidev->device, "SNP %p %s is not a PCI device\n",
-		       efidev->device, efi_devpath_text ( efidev->path ) );
+					      &devpath, &pci_device ) ) != 0 ) {
+		DBGC ( device, "SNP %p %s is not a PCI device\n",
+		       device, efi_handle_name ( device ) );
 		return -EEFI ( efirc );
 	}
 
 	/* Get PCI device information */
-	if ( ( rc = efipci_info ( device, &pci ) ) != 0 ) {
-		DBGC ( efidev->device, "SNP %p %s could not get PCI "
-		       "information: %s\n", efidev->device,
-		       efi_devpath_text ( efidev->path ), strerror ( rc ) );
+	if ( ( rc = efipci_info ( pci_device, &pci ) ) != 0 ) {
+		DBGC ( device, "SNP %p %s could not get PCI information: %s\n",
+		       device, efi_handle_name ( device ), strerror ( rc ) );
 		return rc;
 	}
 
@@ -370,15 +370,15 @@ static int snpnet_pci_info ( struct efi_device *efidev, struct device *dev ) {
  * @ret rc		Return status code
  */
 static int snpnet_dev_info ( struct efi_device *efidev, struct device *dev ) {
+	EFI_HANDLE device = efidev->device;
 	int rc;
 
 	/* Try getting underlying PCI device information */
 	if ( ( rc = snpnet_pci_info ( efidev, dev ) ) == 0 )
 		return 0;
 
-	DBGC ( efidev->device, "SNP %p %s could not get underlying device "
-	       "information\n", efidev->device,
-	       efi_devpath_text ( efidev->path ) );
+	DBGC ( device, "SNP %p %s could not get underlying device "
+	       "information\n", device, efi_handle_name ( device ) );
 	return -ENOTTY;
 }
 
@@ -406,8 +406,7 @@ int snpnet_start ( struct efi_device *efidev ) {
 					    EFI_OPEN_PROTOCOL_EXCLUSIVE )))!=0){
 		rc = -EEFI ( efirc );
 		DBGC ( device, "SNP %p %s cannot open SNP protocol: %s\n",
-		       device, efi_devpath_text ( efidev->path ),
-		       strerror ( rc ) );
+		       device, efi_handle_name ( device ), strerror ( rc ) );
 		goto err_open_protocol;
 	}
 
@@ -438,21 +437,21 @@ int snpnet_start ( struct efi_device *efidev ) {
 	     ( ( efirc = snp->snp->Start ( snp->snp ) ) != 0 ) ) {
 		rc = -EEFI ( efirc );
 		DBGC ( device, "SNP %p %s could not start: %s\n", device,
-		       efi_devpath_text ( efidev->path ), strerror ( rc ) );
+		       efi_handle_name ( device ), strerror ( rc ) );
 		goto err_start;
 	}
 	if ( ( mode->State == EfiSimpleNetworkInitialized ) &&
 	     ( ( efirc = snp->snp->Shutdown ( snp->snp ) ) != 0 ) ) {
 		rc = -EEFI ( efirc );
 		DBGC ( device, "SNP %p %s could not shut down: %s\n", device,
-		       efi_devpath_text ( efidev->path ), strerror ( rc ) );
+		       efi_handle_name ( device ), strerror ( rc ) );
 		goto err_shutdown;
 	}
 
 	/* Populate network device parameters */
 	if ( mode->HwAddressSize != netdev->ll_protocol->hw_addr_len ) {
 		DBGC ( device, "SNP %p %s has invalid hardware address "
-		       "length %d\n", device, efi_devpath_text ( efidev->path ),
+		       "length %d\n", device, efi_handle_name ( device ),
 		       mode->HwAddressSize );
 		rc = -ENOTSUP;
 		goto err_hw_addr_len;
@@ -461,7 +460,7 @@ int snpnet_start ( struct efi_device *efidev ) {
 		 netdev->ll_protocol->hw_addr_len );
 	if ( mode->HwAddressSize != netdev->ll_protocol->ll_addr_len ) {
 		DBGC ( device, "SNP %p %s has invalid link-layer address "
-		       "length %d\n", device, efi_devpath_text ( efidev->path ),
+		       "length %d\n", device, efi_handle_name ( device ),
 		       mode->HwAddressSize );
 		rc = -ENOTSUP;
 		goto err_ll_addr_len;
@@ -474,8 +473,8 @@ int snpnet_start ( struct efi_device *efidev ) {
 	/* Register network device */
 	if ( ( rc = register_netdev ( netdev ) ) != 0 )
 		goto err_register_netdev;
-	DBGC ( device, "SNP %p %s registered as %s\n", device,
-	       efi_devpath_text ( efidev->path ), netdev->name );
+	DBGC ( device, "SNP %p %s registered as %s\n",
+	       device, efi_handle_name ( device ), netdev->name );
 
 	/* Set initial link state */
 	if ( snp->snp->Mode->MediaPresentSupported ) {
@@ -512,6 +511,7 @@ void snpnet_stop ( struct efi_device *efidev ) {
 	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
 	struct net_device *netdev = efidev_get_drvdata ( efidev );
 	struct snp_nic *snp = netdev->priv;
+	EFI_HANDLE device = efidev->device;
 	EFI_STATUS efirc;
 	int rc;
 
@@ -521,9 +521,8 @@ void snpnet_stop ( struct efi_device *efidev ) {
 	/* Stop SNP protocol */
 	if ( ( efirc = snp->snp->Stop ( snp->snp ) ) != 0 ) {
 		rc = -EEFI ( efirc );
-		DBGC ( efidev->device, "SNP %p %s could not stop: %s\n",
-		       efidev->device, efi_devpath_text ( efidev->path ),
-		       strerror ( rc ) );
+		DBGC ( device, "SNP %p %s could not stop: %s\n", device,
+		       efi_handle_name ( device ), strerror ( rc ) );
 		/* Nothing we can do about this */
 	}
 
@@ -533,6 +532,6 @@ void snpnet_stop ( struct efi_device *efidev ) {
 	netdev_put ( netdev );
 
 	/* Close SNP protocol */
-	bs->CloseProtocol ( efidev->device, &efi_simple_network_protocol_guid,
-			    efi_image_handle, efidev->device );
+	bs->CloseProtocol ( device, &efi_simple_network_protocol_guid,
+			    efi_image_handle, device );
 }

src/interface/efi/efi_bofm.c

@@ -238,12 +238,12 @@ static int efi_bofm_start ( struct efi_device *efidev ) {
 					    &bofm1.interface ) ) != 0 ) {
 		rc = -EEFI ( efirc );
 		DBGC ( device, "EFIBOFM %p %s cannot find BOFM protocol\n",
-		       device, efi_devpath_text ( efidev->path ) );
+		       device, efi_handle_name ( device ) );
 		goto err_locate_bofm;
 	}
 	bofmtab = &bofm1.bofm1->BofmTable;
 	DBGC ( device, "EFIBOFM %p %s found version 1 BOFM table at %p+%04x\n",
-	       device, efi_devpath_text ( efidev->path ), bofmtab,
+	       device, efi_handle_name ( device ), bofmtab,
 	       bofmtab->Parameters.Length );
 
 	/* Locate BOFM2 protocol, if available */
@@ -251,35 +251,35 @@ static int efi_bofm_start ( struct efi_device *efidev ) {
 					    &bofm2.interface ) ) == 0 ) {
 		bofmtab2 = &bofm2.bofm2->BofmTable;
 		DBGC ( device, "EFIBOFM %p %s found version 2 BOFM table at "
-		       "%p+%04x\n", device, efi_devpath_text ( efidev->path ),
+		       "%p+%04x\n", device, efi_handle_name ( device ),
 		       bofmtab2, bofmtab2->Parameters.Length );
 		assert ( bofm2.bofm2->RegisterSupport ==
 			 bofm1.bofm1->RegisterSupport );
 	} else {
 		DBGC ( device, "EFIBOFM %p %s cannot find BOFM2 protocol\n",
-		       device, efi_devpath_text ( efidev->path ) );
+		       device, efi_handle_name ( device ) );
 		/* Not a fatal error; may be a BOFM1-only system */
 		bofmtab2 = NULL;
 	}
 
 	/* Process BOFM table */
 	DBGC2 ( device, "EFIBOFM %p %s version 1 before processing:\n",
-		device, efi_devpath_text ( efidev->path ) );
+		device, efi_handle_name ( device ) );
 	DBGC2_HD ( device, bofmtab, bofmtab->Parameters.Length );
 	if ( bofmtab2 ) {
 		DBGC2 ( device, "EFIBOFM %p %s version 2 before processing:\n",
-			device, efi_devpath_text ( efidev->path ) );
+			device, efi_handle_name ( device ) );
 		DBGC2_HD ( device, bofmtab2, bofmtab2->Parameters.Length );
 	}
 	bofmrc = bofm ( virt_to_user ( bofmtab2 ? bofmtab2 : bofmtab ), &pci );
 	DBGC ( device, "EFIBOFM %p %s status %08x\n",
-	       device, efi_devpath_text ( efidev->path ), bofmrc );
+	       device, efi_handle_name ( device ), bofmrc );
 	DBGC2 ( device, "EFIBOFM %p %s version 1 after processing:\n",
-		device, efi_devpath_text ( efidev->path ) );
+		device, efi_handle_name ( device ) );
 	DBGC2_HD ( device, bofmtab, bofmtab->Parameters.Length );
 	if ( bofmtab2 ) {
 		DBGC2 ( device, "EFIBOFM %p %s version 2 after processing:\n",
-			device, efi_devpath_text ( efidev->path ) );
+			device, efi_handle_name ( device ) );
 		DBGC2_HD ( device, bofmtab2, bofmtab2->Parameters.Length );
 	}
 
@@ -289,9 +289,8 @@ static int efi_bofm_start ( struct efi_device *efidev ) {
 							FALSE, bofmrc ) ) != 0){
 			rc = -EEFI ( efirc );
 			DBGC ( device, "EFIBOFM %p %s could not set BOFM2 "
-			       "status: %s\n",
-			       device, efi_devpath_text ( efidev->path ),
-			       strerror ( rc ) );
+			       "status: %s\n", device,
+			       efi_handle_name ( device ), strerror ( rc ) );
 			goto err_set_status;
 		}
 	} else {
@@ -299,9 +298,8 @@ static int efi_bofm_start ( struct efi_device *efidev ) {
 							FALSE, bofmrc ) ) != 0){
 			rc = -EEFI ( efirc );
 			DBGC ( device, "EFIBOFM %p %s could not set BOFM "
-			       "status: %s\n",
-			       device, efi_devpath_text ( efidev->path ),
-			       strerror ( rc ) );
+			       "status: %s\n", device,
+			       efi_handle_name ( device ), strerror ( rc ) );
 			goto err_set_status;
 		}
 	}

src/interface/efi/efi_pci.c

@@ -291,15 +291,14 @@ static int efipci_start ( struct efi_device *efidev ) {
 					    EFI_OPEN_PROTOCOL_EXCLUSIVE ),
 				  pci ) ) != 0 ) {
 		DBGC ( device, "EFIPCI %p %s could not open PCI device: %s\n",
-		       device, efi_devpath_text ( efidev->path ),
-		       strerror ( rc ) );
+		       device, efi_handle_name ( device ), strerror ( rc ) );
 		goto err_open;
 	}
 
 	/* Find driver */
 	if ( ( rc = pci_find_driver ( pci ) ) != 0 ) {
 		DBGC ( device, "EFIPCI %p %s has no driver\n",
-		       device, efi_devpath_text ( efidev->path ) );
+		       device, efi_handle_name ( device ) );
 		goto err_find_driver;
 	}
 
@@ -310,12 +309,12 @@ static int efipci_start ( struct efi_device *efidev ) {
 	/* Probe driver */
 	if ( ( rc = pci_probe ( pci ) ) != 0 ) {
 		DBGC ( device, "EFIPCI %p %s could not probe driver \"%s\": "
-		       "%s\n", device, efi_devpath_text ( efidev->path ),
+		       "%s\n", device, efi_handle_name ( device ),
 		       pci->id->name, strerror ( rc ) );
 		goto err_probe;
 	}
-	DBGC ( device, "EFIPCI %p %s using driver \"%s\"\n", device,
-	       efi_devpath_text ( efidev->path ), pci->id->name );
+	DBGC ( device, "EFIPCI %p %s using driver \"%s\"\n",
+	       device, efi_handle_name ( device ), pci->id->name );
 
 	efidev_set_drvdata ( efidev, pci );
 	return 0;

src/interface/efi/efi_snp.c

@@ -1045,7 +1045,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 	if ( ( rc = efidev_child_add ( efidev, snpdev->handle ) ) != 0 ) {
 		DBGC ( snpdev, "SNPDEV %p could not become child of %p %s: "
 		       "%s\n", snpdev, efidev->device,
-		       efi_devpath_text ( efidev->path ), strerror ( rc ) );
+		       efi_handle_name ( efidev->device ), strerror ( rc ) );
 		goto err_efidev_child_add;
 	}
 
@@ -1064,7 +1064,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 
 	DBGC ( snpdev, "SNPDEV %p installed for %s as device %p %s\n",
 	       snpdev, netdev->name, snpdev->handle,
-	       efi_devpath_text ( &snpdev->path ) );
+	       efi_handle_name ( snpdev->handle ) );
 	return 0;
 
 	if ( snpdev->package_list )