pnp_irq() returns -1 on error but cast to an unsigned. It is confusing
for callers who assume that it returns a negative value. I have
introduced a new define IORESOURCE_INVALID which is the same value but
hopefully it looks less like a negative value.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 89b7c24..fdccfa5 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -55,6 +55,8 @@ struct resource {
#define IORESOURCE_AUTO 0x40000000
#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
+#define IORESOURCE_INVALID ((resource_size_t)-1)
+
/* PnP IRQ specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
#define IORESOURCE_IRQ_LOWEDGE (1<<1)
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 195aafc..818669c 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -151,7 +151,7 @@ static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar)
if (pnp_resource_valid(res))
return res->start;
- return -1;
+ return IORESOURCE_INVALID;
}
static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar)
--
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