Mark Gross writes:
+static int
+tlclk_open(struct inode *inode, struct file *filp)
+{
+ int result;
+#ifdef MODULE
+ if (!MOD_IN_USE) {
+ MOD_INC_USE_COUNT;
+#endif
+ /* Make sure there is no interrupt pending will
+ * initialising interrupt handler */
+ inb(TLCLK_REG6);
+
+ result = request_irq(telclk_interrupt, &tlclk_interrupt,
+ SA_SHIRQ, "telclock", tlclk_interrupt);
Instead of playing the MOD_IN_USE games, please either (1) grab the irq in
module init (it's a shared IRQ after all) or (2) do the following:
static int tlclk_used;
static int tlclk_open(struct inode *inode, struct file *filp) {
if (tlclk_used++)
return 0;
// request_irq goes here.
}
For an example, see the file drivers/input/mouse/amimouse.c (appears in
2.6.12 at least).
Pekka
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