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fpga: dfl: expand minor range when registering chrdev region

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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>
This commit is contained in:
Chengguang Xu 2019-05-09 16:08:29 -05:00 committed by Greg Kroah-Hartman
parent dfe3de8d39
commit de9a7f6f5f
1 changed files with 3 additions and 3 deletions
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6
drivers/fpga/dfl.c
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@ -322,7 +322,7 @@ static void dfl_chardev_uinit(void)
for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) for (i = 0; i < DFL_FPGA_DEVT_MAX; i++)
if (MAJOR(dfl_chrdevs[i].devt)) { if (MAJOR(dfl_chrdevs[i].devt)) {
unregister_chrdev_region(dfl_chrdevs[i].devt, unregister_chrdev_region(dfl_chrdevs[i].devt,
MINORMASK); MINORMASK + 1);
dfl_chrdevs[i].devt = MKDEV(0, 0); dfl_chrdevs[i].devt = MKDEV(0, 0);
} }
} }
@ -332,8 +332,8 @@ static int dfl_chardev_init(void)
int i, ret; int i, ret;
for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) { for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) {
ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0, MINORMASK, ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0,
dfl_chrdevs[i].name); MINORMASK + 1, dfl_chrdevs[i].name);
if (ret) if (ret)
goto exit; goto exit;
} }