Intel:PCI/AER: Queue one GHES event, not several uninitialized ones

mainline inclusion
from mainline-v4.20-rc1
commit 1063a514
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V
CVE: NA

--------------------------------

commit 1063a514 upstream.
Backport summary: for 4.19 kernel ICX PCIe Gen4 support.

ecae65e1 ("PCI/AER: Use kfifo_in_spinlocked() to insert locked
elements") replaced kfifo_put() with kfifo_in_spinlocked(), but passed the
*size* of the queue entry, where kfifo_in_spinlocked() expects the *number*
of entries to be copied.

We want to insert only one element into kfifo, not "sizeof(entry) = 16".
Without this patch, we would get 15 uninitialized elements.

Fixes: ecae65e1 ("PCI/AER: Use kfifo_in_spinlocked() to insert locked elements")
Signed-off-by: NYanjiang Jin <yanjiang.jin@hxt-semitech.com>
[bhelgaas: changelog]
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NKeith Busch <keith.busch@intel.com>
(cherry picked from commit 1063a514)
Signed-off-by: NEthan Zhao <haifeng.zhao@intel.com>
Signed-off-by: NJackie Liu <liuyun01@kylinos.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/pci/pcie/aer.c

@@ -1064,7 +1064,7 @@ void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,
 		.regs		= aer_regs,
 	};
 
-	if (kfifo_in_spinlocked(&aer_recover_ring, &entry, sizeof(entry),
+	if (kfifo_in_spinlocked(&aer_recover_ring, &entry, 1,
 				 &aer_recover_ring_lock))
 		schedule_work(&aer_recover_work);
 	else