Commit 035a6958 authored by Li Zetao's avatar Li Zetao Committed by Juergen Gross
Browse files

xen: xenbus: Use helper function IS_ERR_OR_NULL() 



Use IS_ERR_OR_NULL() to detect an error pointer or a null pointer
open-coding to simplify the code.

Signed-off-by: default avatarLi Zetao <lizetao1@huawei.com>
Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230817014736.3094289-1-lizetao1@huawei.com


Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
parent 71281ec9

drivers/xen/xenbus/xenbus_probe_frontend.c

+1 −1
Original line number Diff line number Diff line
@@ -429,7 +429,7 @@ static void xenbus_check_frontend(char *class, char *dev) 
		printk(KERN_DEBUG "XENBUS: frontend %s %s\n",

				frontend, xenbus_strstate(fe_state));

		backend = xenbus_read(XBT_NIL, frontend, "backend", NULL);

		if (!backend || IS_ERR(backend))

		if (IS_ERR_OR_NULL(backend))

			goto out;

		err = xenbus_scanf(XBT_NIL, backend, "state", "%i", &be_state);

		if (err == 1)