Until recently uio_get_minor() returned 0 for success and
a negative value on failure. This became non-negative for suceess and
negative for failure. Restore the original return value spec so that we can
successfully initialize UIO devices with a non-zero minor device
number.
Signed-off-by: Damian Hobson-Garcia <dhobs...@igel.co.jp>
---
drivers/uio/uio.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index c8b9262..b645c47 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -374,6 +374,7 @@ static int uio_get_minor(struct uio_device *idev)
retval = idr_alloc(&uio_idr, idev, 0, UIO_MAX_DEVICES, GFP_KERNEL);
if (retval >= 0) {
idev->minor = retval;
+ retval = 0;
} else if (retval == -ENOSPC) {
dev_err(idev->dev, "too many uio devices\n");
retval = -EINVAL;
--
1.7.5.4
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