From 144f1cd40bf91fb3ac1d41806470756ce774f389 Mon Sep 17 00:00:00 2001 From: Qilin Tan Date: Fri, 31 Mar 2023 17:26:56 +0800 Subject: f2fs: fix iostat lock protection Made iostat lock irq safe to avoid potentinal deadlock. Deadlock scenario: f2fs_attr_store -> f2fs_sbi_store -> _sbi_store -> spin_lock(sbi->iostat_lock) -> scsi_end_request -> bio_endio -> f2fs_dio_read_end_io -> f2fs_update_iostat -> spin_lock_irqsave(sbi->iostat_lock) ===> Dead lock here Fixes: 61803e984307 ("f2fs: fix iostat related lock protection") Fixes: a1e09b03e6f5 ("f2fs: use iomap for direct I/O") Signed-off-by: Qilin Tan Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/sysfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/f2fs/sysfs.c') diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 9ddc6ee19433..fefc6b728590 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -575,9 +575,9 @@ out: if (!strcmp(a->attr.name, "iostat_period_ms")) { if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS) return -EINVAL; - spin_lock(&sbi->iostat_lock); + spin_lock_irq(&sbi->iostat_lock); sbi->iostat_period_ms = (unsigned int)t; - spin_unlock(&sbi->iostat_lock); + spin_unlock_irq(&sbi->iostat_lock); return count; } #endif -- cgit v1.2.3