From 35af9fb49bc5c6d61ef70b501c3a56fe161cce3e Mon Sep 17 00:00:00 2001 From: Jiasheng Jiang Date: Tue, 11 Jan 2022 15:34:11 +0800 Subject: [PATCH] fsi: core: Check error number after calling ida_simple_get If allocation fails, the ida_simple_get() will return error number. So master->idx could be error number and be used in dev_set_name(). Therefore, it should be better to check it and return error if fails, like the ida_simple_get() in __fsi_get_new_minor(). Fixes: 09aecfab93b8 ("drivers/fsi: Add fsi master definition") Signed-off-by: Jiasheng Jiang Reviewed-by: Eddie James Link: https://lore.kernel.org/r/20220111073411.614138-1-jiasheng@iscas.ac.cn Signed-off-by: Joel Stanley --- drivers/fsi/fsi-core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 0d11a17c53a0..694e80c06665 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -1314,6 +1314,9 @@ int fsi_master_register(struct fsi_master *master) mutex_init(&master->scan_lock); master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL); + if (master->idx < 0) + return master->idx; + dev_set_name(&master->dev, "fsi%d", master->idx); master->dev.class = &fsi_master_class;