diff options
| author | Will Deacon <will.deacon@arm.com> | 2019-02-22 17:18:02 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-08 12:09:05 +0100 |
| commit | 161861a4c8279f136e5419deb95c58176af83e48 (patch) | |
| tree | 021f3aa8c03d950fbb530f05b1ce1fb6258643d4 /drivers/scsi/qla1280.c | |
| parent | fb24ea52f78e0d595852e09e3a55697c8f442189 (diff) | |
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 <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/scsi/qla1280.c')
| -rw-r--r-- | drivers/scsi/qla1280.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c index 93acbc5094f0..327eff67a1ee 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); |