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)
<interrupt request>
-> 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 <qilin.tan@mediatek.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>