From: Li Zetao Date: Thu, 17 Aug 2023 01:47:36 +0000 (+0800) Subject: xen: xenbus: Use helper function IS_ERR_OR_NULL() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=035a69586f329e3e73750299695401e0c2b76ee2;p=linux.git 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: Li Zetao Reviewed-by: Juergen Gross Link: https://lore.kernel.org/r/20230817014736.3094289-1-lizetao1@huawei.com Signed-off-by: Juergen Gross --- diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c index 3f3836cb72799..fcb335bb7b187 100644 --- a/drivers/xen/xenbus/xenbus_probe_frontend.c +++ b/drivers/xen/xenbus/xenbus_probe_frontend.c @@ -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)