Fix NPU driver inference poll callback return type
The poll file operation function pointer is expected to return the
__poll_t type but the currently implemented poll inference function
returns an unsigned int. This breaks the type safety and causes Sparse
to generate a warning.
To resolve this, the return type has been changed to __poll_t and the
function now uses with EPOLL constants that share the same type.
Change-Id: I41dadb758c7c4b42b431d96a94c6b2cc9f960013
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
diff --git a/kernel/ethosu_inference.c b/kernel/ethosu_inference.c
index 57529f9..ac617c3 100644
--- a/kernel/ethosu_inference.c
+++ b/kernel/ethosu_inference.c
@@ -41,8 +41,8 @@
static int ethosu_inference_release(struct inode *inode,
struct file *file);
-static unsigned int ethosu_inference_poll(struct file *file,
- poll_table *wait);
+static __poll_t ethosu_inference_poll(struct file *file,
+ poll_table *wait);
static long ethosu_inference_ioctl(struct file *file,
unsigned int cmd,
@@ -184,16 +184,16 @@
return 0;
}
-static unsigned int ethosu_inference_poll(struct file *file,
- poll_table *wait)
+static __poll_t ethosu_inference_poll(struct file *file,
+ poll_table *wait)
{
struct ethosu_inference *inf = file->private_data;
- int ret = 0;
+ __poll_t ret = 0;
poll_wait(file, &inf->waitq, wait);
if (inf->done)
- ret |= POLLIN;
+ ret |= EPOLLIN;
return ret;
}