[U-Boot] [PATCH 21/23] efi_loader: fix efi_net_get_status

[Heinrich Schuchardt <xypron.glpk@gmx.de>]

The returned interrupt status was wrong.

As out transmit buffer is empty we need to always set
EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT.

When we have received a packet we need to set
EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT.

Furthermore we should call efi_timer_check() to handle events.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
 include/efi_api.h        |  6 ++++++
 lib/efi_loader/efi_net.c | 11 ++++++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/include/efi_api.h b/include/efi_api.h
index 029b57ca5e..7d2355c033 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -537,6 +537,12 @@ struct efi_simple_network_mode {
 #define EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS           0x08
 #define EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST 0x10
 
+/* interrupt status bit mask */
+#define EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT	0x01
+#define EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT	0x02
+#define EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT	0x04
+#define EFI_SIMPLE_NETWORK_SOFTWARE_INTERRUPT	0x08
+
 struct efi_simple_network
 {
 	u64 revision;
diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c
index 7659109386..e15f403c20 100644
--- a/lib/efi_loader/efi_net.c
+++ b/lib/efi_loader/efi_net.c
@@ -127,9 +127,14 @@ static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this,
 {
 	EFI_ENTRY("%p, %p, %p", this, int_status, txbuf);
 
-	/* We send packets synchronously, so nothing is outstanding */
-	if (int_status)
-		*int_status = 0;
+	efi_timer_check();
+
+	if (int_status) {
+		/* We send packets synchronously, so nothing is outstanding */
+		*int_status = EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
+		if (new_rx_packet)
+			*int_status |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
+	}
 	if (txbuf)
 		*txbuf = new_tx_packet;
 
-- 
2.14.1