spi: hisi-sfc-v3xx: fix potential irq race condition

mainline inclusion
from mainline-v5.13-rc1
commit 4c84e42d
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I63WDM
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4c84e42d29af



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We mask the irq when the command completion is timeout. This won't
stop the already running irq handler. Use sychronize_irq() after
we mask the irq, to make sure there is no running handler.

Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/1618228708-37949-2-git-send-email-yangyicong@hisilicon.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Wangming Shao <shaowangming@h-partners.com>
Reviewed-by: Yicong Yang <yangyicong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>