bcm47xx: 5.15: fix compilation warning for yenta socket patchi

Rework the patch to completely disable yenta_probe_irq function.
The generated mask is zero by lack due to the fact that probe_irq_mask
use a val never initialized. Correctly rework the ifdef to make the
function always return 0.

Fix compilation warning:
drivers/pcmcia/yenta_socket.c:926:13: error: unused variable 'i' [-Werror=unused-variable]
  926 |         int i;
      |             ^
drivers/pcmcia/yenta_socket.c:954:16: error: 'val' is used uninitialized [-Werror=uninitialized]
  954 |         mask = probe_irq_mask(val) & 0xffff;
      |                ^~~~~~~~~~~~~~~~~~~
drivers/pcmcia/yenta_socket.c:927:23: note: 'val' was declared here
  927 |         unsigned long val;
      |                       ^~~
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <[email protected]>

target/linux/bcm47xx/patches-5.15/940-bcm47xx-yenta.patch

@@ -1,23 +1,25 @@
 --- a/drivers/pcmcia/yenta_socket.c
 +++ b/drivers/pcmcia/yenta_socket.c
-@@ -932,6 +932,8 @@ static unsigned int yenta_probe_irq(stru
- 	 * Probe for usable interrupts using the force
- 	 * register to generate bogus card status events.
- 	 */
+@@ -923,6 +923,8 @@ static struct cardbus_type cardbus_type[
+ 
+ static unsigned int yenta_probe_irq(struct yenta_socket *socket, u32 isa_irq_mask)
+ {
++/* WRT54G3G does not like this */
 +#ifndef CONFIG_BCM47XX
-+	/* WRT54G3G does not like this */
- 	cb_writel(socket, CB_SOCKET_EVENT, -1);
- 	cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);
- 	reg = exca_readb(socket, I365_CSCINT);
-@@ -947,6 +949,7 @@ static unsigned int yenta_probe_irq(stru
- 	}
- 	cb_writel(socket, CB_SOCKET_MASK, 0);
- 	exca_writeb(socket, I365_CSCINT, reg);
+ 	int i;
+ 	unsigned long val;
+ 	u32 mask;
+@@ -951,6 +953,9 @@ static unsigned int yenta_probe_irq(stru
+ 	mask = probe_irq_mask(val) & 0xffff;
+ 
+ 	return mask;
++#else
++	return 0;
 +#endif
+ }
  
- 	mask = probe_irq_mask(val) & 0xffff;
  
-@@ -1031,6 +1034,10 @@ static void yenta_get_socket_capabilitie
+@@ -1031,6 +1036,10 @@ static void yenta_get_socket_capabilitie
  	else
  		socket->socket.irq_mask = 0;
  
@@ -28,7 +30,7 @@
  	dev_info(&socket->dev->dev, "ISA IRQ mask 0x%04x, PCI irq %d\n",
  		 socket->socket.irq_mask, socket->cb_irq);
  }
-@@ -1262,6 +1269,15 @@ static int yenta_probe(struct pci_dev *d
+@@ -1262,6 +1271,15 @@ static int yenta_probe(struct pci_dev *d
  	dev_info(&dev->dev, "Socket status: %08x\n",
  		 cb_readl(socket, CB_SOCKET_STATE));