[PATCH 4/4] staging: octeon: fix IRQ leak error path and remove dst.h from ethernet-spi.c

["Oscar Alejandro Sánchez Lucero via B4 Relay" <devnull+aleszlucero.gmail.com@kernel.org>]

From: Oscar Alejandro Sánchez Lucero <aleszlucero@gmail.com>

Fix a resource leak in cvm_oct_spi_init() by properly validating the
return value of cvm_oct_common_init(). If the common initialization
fails, perform a rollback by decrementing the spi port counter and
releasing the shared RML interrupt handler via free_irq().

Additionally, clean up the file header by removing the unused inclusion
of <net/dst.h>.

Signed-off-by: Oscar Alejandro Sánchez Lucero <aleszlucero@gmail.com>
---
 drivers/staging/octeon/ethernet-spi.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/octeon/ethernet-spi.c b/drivers/staging/octeon/ethernet-spi.c
index 699c98c5ec13..e6ebc879ccad 100644
--- a/drivers/staging/octeon/ethernet-spi.c
+++ b/drivers/staging/octeon/ethernet-spi.c
@@ -8,7 +8,6 @@
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
 #include <linux/interrupt.h>
-#include <net/dst.h>
 
 #include "octeon-ethernet.h"
 #include "ethernet-defines.h"
@@ -206,7 +205,14 @@ int cvm_oct_spi_init(struct net_device *dev)
 		cvm_oct_spi_enable_error_reporting(INTERFACE(priv->port));
 		priv->poll = cvm_oct_spi_poll;
 	}
-	cvm_oct_common_init(dev);
+	r = cvm_oct_common_init(dev);
+	if (r) {
+		number_spi_ports--;
+		if (number_spi_ports == 0)
+			free_irq(OCTEON_IRQ_RML, &number_spi_ports);
+		return r;
+	}
+
 	return 0;
 }
 

-- 
2.56.0