mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 02:29:01 +00:00
64de3076c3
This fixes a warning in the SPI driver at bootup. This warning is seen in kernel 5.4 on lantiq deives. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
36 lines
1.5 KiB
Diff
36 lines
1.5 KiB
Diff
From 907137d9ef048e7d0282c28e47b32aa4084ad395 Mon Sep 17 00:00:00 2001
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Mon, 6 Jul 2020 00:05:12 +0200
|
|
Subject: [PATCH v2] spi: lantiq-ssc: Fix warning by using WQ_MEM_RECLAIM
|
|
|
|
The lantiq-ssc driver uses internally an own workqueue to wait till the
|
|
data is not only written out of the FIFO but really written to the wire.
|
|
This workqueue is flushed while the SPI subsystem is working in some
|
|
other system workqueue.
|
|
|
|
The system workqueue is marked as WQ_MEM_RECLAIM, but the workqueue in
|
|
the lantiq-ssc driver does not use WQ_MEM_RECLAIM for now. Add this flag
|
|
too to prevent this warning.
|
|
|
|
This fixes the following warning:
|
|
[ 2.975956] WARNING: CPU: 1 PID: 17 at kernel/workqueue.c:2614 check_flush_dependency+0x168/0x184
|
|
[ 2.984752] workqueue: WQ_MEM_RECLAIM kblockd:blk_mq_run_work_fn is flushing !WQ_MEM_RECLAIM 1e100800.spi:0x0
|
|
|
|
Fixes: 891b7c5fbf61 ("mtd_blkdevs: convert to blk-mq")
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
|
---
|
|
drivers/spi/spi-lantiq-ssc.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
--- a/drivers/spi/spi-lantiq-ssc.c
|
|
+++ b/drivers/spi/spi-lantiq-ssc.c
|
|
@@ -907,7 +907,7 @@ static int lantiq_ssc_probe(struct platf
|
|
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(2, 8) |
|
|
SPI_BPW_MASK(16) | SPI_BPW_MASK(32);
|
|
|
|
- spi->wq = alloc_ordered_workqueue(dev_name(dev), 0);
|
|
+ spi->wq = alloc_ordered_workqueue(dev_name(dev), WQ_MEM_RECLAIM);
|
|
if (!spi->wq) {
|
|
err = -ENOMEM;
|
|
goto err_clk_put;
|