File 5d0cf4e4-AMD-IOMMU-initialize-IRQ-tasklet-once.patch of Package xen.12874

References: bsc#1135799

# Commit 587c39e552fbbdfa4ca64c703ad9df7191a76e8e
# Date 2019-06-21 17:16:52 +0200
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
AMD/IOMMU: initialize IRQ tasklet only once

Don't do this once per IOMMU, nor after setting up the IOMMU interrupt
(which will want to schedule this tasklet). In fact it can be
initialized at build time.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Brian Woods <brian.woods@amd.com>

--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -31,7 +31,8 @@
 
 static int __initdata nr_amd_iommus;
 
-static struct tasklet amd_iommu_irq_tasklet;
+static void do_amd_iommu_irq(unsigned long data);
+static DECLARE_SOFTIRQ_TASKLET(amd_iommu_irq_tasklet, do_amd_iommu_irq, 0);
 
 unsigned int __read_mostly ivrs_bdf_entries;
 u8 __read_mostly ivhd_type;
@@ -1056,8 +1057,6 @@ static int __init amd_iommu_init_one(str
     printk("AMD-Vi: IOMMU %d Enabled.\n", nr_amd_iommus );
     nr_amd_iommus++;
 
-    softirq_tasklet_init(&amd_iommu_irq_tasklet, do_amd_iommu_irq, 0);
-
     return 0;
 
 error_out: