[v2] fpga: dfl: expand minor range when registering chrdev region

Commit Message

Chengguang Xu Feb. 21, 2019, 7:46 a.m. UTC

Actually, total amount of available minor number
for a single major is MINORMASK + 1. So expand
minor range when registering chrdev region.

Signed-off-by: Chengguang Xu <[e-mail]>
Acked-by: Wu Hao <[e-mail]>
---
v1->v2:
- Fix typo in subject.

 drivers/fpga/dfl.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 2c09e502e721..02fff566be46 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -315,7 +315,7 @@  static void dfl_chardev_uinit(void)
 	for (i = 0; i < DFL_FPGA_DEVT_MAX; i++)
 		if (MAJOR(dfl_chrdevs[i].devt)) {
 			unregister_chrdev_region(dfl_chrdevs[i].devt,
-						 MINORMASK);
+						 MINORMASK + 1);
 			dfl_chrdevs[i].devt = MKDEV(0, 0);
 		}
 }
@@ -325,8 +325,8 @@  static int dfl_chardev_init(void)
 	int i, ret;
 
 	for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) {
-		ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0, MINORMASK,
-					  dfl_chrdevs[i].name);
+		ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0,
+					  MINORMASK + 1, dfl_chrdevs[i].name);
 		if (ret)
 			goto exit;
 	}