From: Chengguang Xu <cgxu519@gmx.com>
Date: Thu, 9 May 2019 21:08:29 +0000 (-0500)
Subject: fpga: dfl: expand minor range when registering chrdev region
X-Git-Tag: v5.2-rc4~6^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=de9a7f6f5f1967d275311cca9163b4a3ffe9b0ae;p=thirdparty%2Fkernel%2Flinux.git

fpga: dfl: expand minor range when registering chrdev region

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 <cgxu519@gmx.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index c25217cde5cac..4b66aaa32b5ab 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -322,7 +322,7 @@ 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);
 		}
 }
@@ -332,8 +332,8 @@ 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;
 	}