joel16/android_kernel_sony_msm8994
1
0
Fork 0
mirror of https://github.com/joel16/android_kernel_sony_msm8994.git synced 2024-11-27 06:01:12 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

uio: fix allocating minor id for uio device

Browse Source 
The number of uio devices that could be used should be less than
UIO_MAX_DEVICES by design, and this work guards any cases in which id
more than UIO_MAX_DEVICES is utilized.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Hans J. Koch <hjk@hansjkoch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hillf Danton 2011-03-31 20:38:47 +08:00 committed by Greg Kroah-Hartman
parent f0c554fddd
commit c6edc42fe1
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/uio/uio.c
View File

@ -381,7 +381,13 @@ static int uio_get_minor(struct uio_device *idev)
retval = -ENOMEM;
goto exit;
}
idev->minor = id & MAX_ID_MASK;
if (id < UIO_MAX_DEVICES) {
idev->minor = id;
} else {
dev_err(idev->dev, "too many uio devices\n");
retval = -EINVAL;
idr_remove(&uio_idr, id);
}
exit:
mutex_unlock(&minor_lock);
return retval;