From: Will Deacon Date: Fri, 22 Feb 2019 17:18:02 +0000 (+0000) Subject: scsi/qla1280: Remove stale comment about mmiowb() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=161861a4c8279f136e5419deb95c58176af83e48;p=linux.git scsi/qla1280: Remove stale comment about mmiowb() All mmiowb() invocations have been removed, so there's no need to keep banging on about it. Acked-by: Linus Torvalds Signed-off-by: Will Deacon --- diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c index 93acbc5094f05..327eff67a1eee 100644 --- a/drivers/scsi/qla1280.c +++ b/drivers/scsi/qla1280.c @@ -3363,16 +3363,6 @@ qla1280_isp_cmd(struct scsi_qla_host *ha) /* * Update request index to mailbox4 (Request Queue In). - * The mmiowb() ensures that this write is ordered with writes by other - * CPUs. Without the mmiowb(), it is possible for the following: - * CPUA posts write of index 5 to mailbox4 - * CPUA releases host lock - * CPUB acquires host lock - * CPUB posts write of index 6 to mailbox4 - * On PCI bus, order reverses and write of 6 posts, then index 5, - * causing chip to issue full queue of stale commands - * The mmiowb() prevents future writes from crossing the barrier. - * See Documentation/driver-api/device-io.rst for more information. */ WRT_REG_WORD(®->mailbox4, ha->req_ring_index);