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author | Thomas Nixon <tom@tomn.co.uk> | 2023-03-26 10:19:21 +0000 |
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committer | Hauke Mehrtens <hauke@hauke-m.de> | 2023-04-02 22:07:26 +0200 |
commit | 354ad1084a074392e72d61e68e9bdbf16b4b774b (patch) | |
tree | 2e7381ca2e6d90296e372cab6eb9d19534ea90c0 /target/linux/apm821xx/dts/netgear-wndap660.dts | |
parent | 6035401f46461bcbe4f0a78d6a751f9ae09557ae (diff) | |
download | upstream-354ad1084a074392e72d61e68e9bdbf16b4b774b.tar.gz upstream-354ad1084a074392e72d61e68e9bdbf16b4b774b.tar.bz2 upstream-354ad1084a074392e72d61e68e9bdbf16b4b774b.zip |
lantiq: nand: don't yield while holding spinlock
The nand driver normally while waiting for the device to become ready;
this is normally fine, but xway_nand holds the ebu_lock spinlock, and
this can cause lockups if other threads which use ebu_lock are
interleaved. Fix this by waiting instead of polling.
This mainly showed up as crashes in ath9k_pci_owl_loader (see
https://github.com/openwrt/openwrt/issues/9829 ), but turning on
spinlock debugging shows this happening in other places too.
This doesn't seem to measurably impact boot time.
Tested on bt_homehub-v5a with 5.10 and 5.15.
Signed-off-by: Thomas Nixon <tom@tomn.co.uk>
[Add commit description into patch]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit d3b47909b199b876f67a0387b5545cb73bd6b815)
Diffstat (limited to 'target/linux/apm821xx/dts/netgear-wndap660.dts')
0 files changed, 0 insertions, 0 deletions