arm: dts: rk3288-evb-rk818: set tsadc default pinctrl to gpio

[firefly-linux-kernel-4.4.55.git] / block / bsg.c

diff --git a/block/bsg.c b/block/bsg.c
index d214e929ce1855bb653808f03482580b45b5344e..b9a53615bdef4945748057e5efbfef56c5cb4847 100644 (file)
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -655,6 +655,9 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 
        dprintk("%s: write %Zd bytes\n", bd->name, count);
 
+       if (unlikely(segment_eq(get_fs(), KERNEL_DS)))
+               return -EINVAL;
+
        bsg_set_block(bd, file);
 
        bytes_written = 0;