From: Jiasheng Jiang jiasheng@iscas.ac.cn
stable inclusion from stable-v5.10.150 commit 382a5fc49e6eee5b05b4e91744b7a5fd9f9bcbbb category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0XA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 35af9fb49bc5c6d61ef70b501c3a56fe161cce3e ]
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 jiasheng@iscas.ac.cn Reviewed-by: Eddie James eajames@linux.ibm.com Link: https://lore.kernel.org/r/20220111073411.614138-1-jiasheng@iscas.ac.cn Signed-off-by: Joel Stanley joel@jms.id.au Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- 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 59ddc9fd5bca..92e6eebd1851 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -1309,6 +1309,9 @@ 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;