Commit-ID: 27a6f41c1a20a3339f456647a21e45fca5b82b62
Gitweb: http://git.kernel.org/tip/27a6f41c1a20a3339f456647a21e45fca5b82b62
Author: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
AuthorDate: Tue, 4 Aug 2015 14:02:55 +0930
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 6 Aug 2015 00:14:58 +0200
x86/lguest: Clean up lguest_setup_irq
We make it static and hoist it higher in the file for the next patch.
We also give a nice panic if it fails during boot.
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1438662776-4823-1-git-send-email-rusty@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/lguest/boot.c | 43 ++++++++++++++++++++++---------------------
1 file changed, 22 insertions(+), 21 deletions(-)
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index f2dc08c..d933a11 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -835,6 +835,26 @@ static struct irq_chip lguest_irq_controller = {
.irq_unmask = enable_lguest_irq,
};
+/*
+ * Interrupt descriptors are allocated as-needed, but low-numbered ones are
+ * reserved by the generic x86 code. So we ignore irq_alloc_desc_at if it
+ * tells us the irq is already used: other errors (ie. ENOMEM) we take
+ * seriously.
+ */
+static int lguest_setup_irq(unsigned int irq)
+{
+ int err;
+
+ /* Returns -ve error or vector number. */
+ err = irq_alloc_desc_at(irq, 0);
+ if (err < 0 && err != -EEXIST)
+ return err;
+
+ irq_set_chip_and_handler_name(irq, &lguest_irq_controller,
+ handle_level_irq, "level");
+ return 0;
+}
+
static int lguest_enable_irq(struct pci_dev *dev)
{
u8 line = 0;
@@ -879,26 +899,6 @@ static void __init lguest_init_IRQ(void)
}
/*
- * Interrupt descriptors are allocated as-needed, but low-numbered ones are
- * reserved by the generic x86 code. So we ignore irq_alloc_desc_at if it
- * tells us the irq is already used: other errors (ie. ENOMEM) we take
- * seriously.
- */
-int lguest_setup_irq(unsigned int irq)
-{
- int err;
-
- /* Returns -ve error or vector number. */
- err = irq_alloc_desc_at(irq, 0);
- if (err < 0 && err != -EEXIST)
- return err;
-
- irq_set_chip_and_handler_name(irq, &lguest_irq_controller,
- handle_level_irq, "level");
- return 0;
-}
-
-/*
* Time.
*
* It would be far better for everyone if the Guest had its own clock, but
@@ -1040,7 +1040,8 @@ static void lguest_time_irq(unsigned int irq, struct irq_desc *desc)
static void lguest_time_init(void)
{
/* Set up the timer interrupt (0) to go to our simple timer routine */
- lguest_setup_irq(0);
+ if (lguest_setup_irq(0) != 0)
+ panic("Could not set up timer irq");
irq_set_handler(0, lguest_time_irq);
clocksource_register_hz(&lguest_clock, NSEC_PER_SEC);
--
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