irq_remapping/vt-d: Init all MSI entries not just the first one

Commit b106ee63abcc ("irq_remapping/vt-d: Enhance Intel IR driver to
support hierarchical irqdomains") caused a regression, which forgot
to initialize remapping data structures other than the first entry
when setting up remapping entries for multiple MSIs.

[ Jiang: Commit message ]

Fixes: b106ee63abcc ("irq_remapping/vt-d: Enhance Intel IR driver to support hierarchical irqdomains")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Cohen <david.a.cohen@linux.intel.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: iommu@lists.linux-foundation.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Joerg Roedel <joro@8bytes.org>
Link: http://lkml.kernel.org/r/1430707662-28598-2-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 14d9569..7ecc6b3 100644 (file)
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -1113,7 +1113,7 @@ static int intel_irq_remapping_alloc(struct irq_domain *domain,
 {
        struct intel_iommu *iommu = domain->host_data;
        struct irq_alloc_info *info = arg;
-       struct intel_ir_data *data;
+       struct intel_ir_data *data, *ird;
        struct irq_data *irq_data;
        struct irq_cfg *irq_cfg;
        int i, ret, index;
@@ -1158,14 +1158,20 @@ static int intel_irq_remapping_alloc(struct irq_domain *domain,
                }
 
                if (i > 0) {
-                       data = kzalloc(sizeof(*data), GFP_KERNEL);
-                       if (!data)
+                       ird = kzalloc(sizeof(*ird), GFP_KERNEL);
+                       if (!ird)
                                goto out_free_data;
+                       /* Initialize the common data */
+                       ird->irq_2_iommu = data->irq_2_iommu;
+                       ird->irq_2_iommu.sub_handle = i;
+               } else {
+                       ird = data;
                }
+
                irq_data->hwirq = (index << 16) + i;
-               irq_data->chip_data = data;
+               irq_data->chip_data = ird;
                irq_data->chip = &intel_ir_chip;
-               intel_irq_remapping_prepare_irte(data, irq_cfg, info, index, i);
+               intel_irq_remapping_prepare_irte(ird, irq_cfg, info, index, i);
                irq_set_status_flags(virq + i, IRQ_MOVE_PCNTXT);
        }
        return 0;