From: Fenghua Yu Date: Wed, 12 Jul 2023 17:44:36 +0000 (-0700) Subject: dmaengine: idxd: Expose ATS disable knob only when WQ ATS is supported X-Git-Tag: v6.4.16~111 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5d80eb3764cdce1e3fa5372637d65e035d94577;p=thirdparty%2Fkernel%2Fstable.git dmaengine: idxd: Expose ATS disable knob only when WQ ATS is supported [ Upstream commit 62b41b656666d2d35890124df5ef0881fe6d6769 ] WQ Advanced Translation Service (ATS) can be controlled only when WQ ATS is supported. The sysfs ATS disable knob should be visible only when the features is supported. Signed-off-by: Fenghua Yu Reviewed-by: Dave Jiang Link: https://lore.kernel.org/r/20230712174436.3435088-2-fenghua.yu@intel.com Signed-off-by: Vinod Koul Stable-dep-of: 0056a7f07b0a ("dmaengine: idxd: Allow ATS disable update only for configurable devices") Signed-off-by: Sasha Levin --- diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 36a30957ac9a3..d16c16445c4f9 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1088,16 +1088,12 @@ static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute const char *buf, size_t count) { struct idxd_wq *wq = confdev_to_wq(dev); - struct idxd_device *idxd = wq->idxd; bool ats_dis; int rc; if (wq->state != IDXD_WQ_DISABLED) return -EPERM; - if (!idxd->hw.wq_cap.wq_ats_support) - return -EOPNOTSUPP; - rc = kstrtobool(buf, &ats_dis); if (rc < 0) return rc; @@ -1316,6 +1312,9 @@ static umode_t idxd_wq_attr_visible(struct kobject *kobj, if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd)) return 0; + if (idxd_wq_attr_invisible(ats_disable, wq_ats_support, attr, idxd)) + return 0; + return attr->mode; }