Subject: [PATCH 03/32] net/mlx5: Fix build break when CONFIG_SMP=n

From: Saeed Mahameed <[email-masked]>
Date: Mon, 14 May 2018 15:38:10 -0700

[ Upstream commit e3ca34880652250f524022ad89e516f8ba9a805b ]

Avoid using the kernel's irq_descriptor and return IRQ vector affinity
directly from the driver.

This fixes the following build break when CONFIG_SMP=n

include/linux/mlx5/driver.h: In function ‘mlx5_get_vector_affinity_hint’:
include/linux/mlx5/driver.h:1299:13: error:
        ‘struct irq_desc’ has no member named ‘affinity_hint’

Fixes: 6082d9c9c94a ("net/mlx5: Fix mlx5_get_vector_affinity function")
Signed-off-by: Saeed Mahameed <[email-masked]>
CC: Randy Dunlap <[email-masked]>
CC: Guenter Roeck <[email-masked]>
CC: Thomas Gleixner <[email-masked]>
Tested-by: Israel Rukshin <[email-masked]>
Reported-by: kbuild test robot <[email-masked]>
Reported-by: Randy Dunlap <[email-masked]>
Tested-by: Randy Dunlap <[email-masked]>
Acked-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 include/linux/mlx5/driver.h | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 1352b1b990a7..3ebb2f6ace79 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1271,17 +1271,7 @@ enum {
 static inline const struct cpumask *
 mlx5_get_vector_affinity_hint(struct mlx5_core_dev *dev, int vector)
 {
-	struct irq_desc *desc;
-	unsigned int irq;
-	int eqn;
-	int err;
-
-	err = mlx5_vector2eqn(dev, vector, &eqn, &irq);
-	if (err)
-		return NULL;
-
-	desc = irq_to_desc(irq);
-	return desc->affinity_hint;
+	return dev->priv.irq_info[vector].mask;
 }
 
 #endif /* MLX5_DRIVER_H */
-- 
2.14.3