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| author | Julien Grall <julien.grall@linaro.org> | 2015-05-06 17:09:06 +0300 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-05-28 14:23:10 +0300 |
| commit | 81e863c3a28e69fd60411bde9f779b0f8ad0212a (patch) | |
| tree | 02516881b40ace1d990621faf2c3b10d68993c27 /arch/arm | |
| parent | ba155e2d21f6bf05de86a78dbe5bfd8757604a65 (diff) | |
| download | linux-81e863c3a28e69fd60411bde9f779b0f8ad0212a.tar.xz | |
arm/xen: Correctly check if the event channel interrupt is present
The function irq_of_parse_and_map returns 0 when the IRQ is not found.
Futhermore, move the check before notifying the user that we are running on
Xen.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/xen/enlighten.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 7d0f07020c80..6fbdc8fa4a19 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -51,7 +51,7 @@ EXPORT_SYMBOL_GPL(xen_have_vector_callback); int xen_platform_pci_unplug = XEN_UNPLUG_ALL; EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); -static __read_mostly int xen_events_irq = -1; +static __read_mostly unsigned int xen_events_irq; int xen_remap_domain_mfn_array(struct vm_area_struct *vma, unsigned long addr, @@ -179,12 +179,14 @@ static int __init xen_guest_init(void) return 0; grant_frames = res.start; xen_events_irq = irq_of_parse_and_map(node, 0); + if (!xen_events_irq) { + pr_debug("Xen event channel interrupt not found\n"); + return -ENODEV; + } + pr_info("Xen %s support found, events_irq=%d gnttab_frame=%pa\n", version, xen_events_irq, &grant_frames); - if (xen_events_irq < 0) - return -ENODEV; - xen_domain_type = XEN_HVM_DOMAIN; xen_setup_features(); |