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

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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>
This commit is contained in:
Yicong Yang 2021-04-12 19:58:27 +08:00 committed by Mark Brown
parent 828b480977
commit 4c84e42d29
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1 changed files with 1 additions and 0 deletions
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drivers/spi/spi-hisi-sfc-v3xx.c
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@ -342,6 +342,7 @@ static int hisi_sfc_v3xx_generic_exec_op(struct hisi_sfc_v3xx_host *host,
ret = 0;
hisi_sfc_v3xx_disable_int(host);
synchronize_irq(host->irq);
host->completion = NULL;
} else {
ret = hisi_sfc_v3xx_wait_cmd_idle(host);