There have been multiple reports of performance regressions caused by commit 3c7ac40d7322 ("scsi: ufs: core: Delegate the interrupt service routine to a threaded IRQ handler"). Hence this revert. This patch reverts most of the following commits: * 3c7ac40d7322 ("scsi: ufs: core: Delegate the interrupt service routine to a threaded IRQ handler") * 6475cfb81fc4 ("scsi: ufs: core: Avoid IRQ thread wakeup during active UIC command") This patch preserves the following commits: * 034d319c8899 ("scsi: ufs: core: Fix interrupt handling for MCQ Mode") * eabcac808ca3 ("scsi: ufs: core: Fix IRQ lock inversion for the SCSI host lock") Cc: Neil Armstrong <neil.armstrong@linaro.org> Cc: 孙魁 (Kui Sun) <kui.sun@unisoc.com> Cc: André Draszik <andre.draszik@linaro.org> Cc: Gregory CLEMENT <gregory.clement@bootlin.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Fixes: 3c7ac40d7322 ("scsi: ufs: core: Delegate the interrupt service routine to a threaded IRQ handler") Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: André Draszik <andre.draszik@linaro.org> # on Pixel 6 Reviewed-by: André Draszik <andre.draszik@linaro.org> Link: https://patch.msgid.link/b70eb60a01f971bed68c42c5b555929db5f835df.1784135511.git.bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>