From: Dave Jiang <dave.jiang@intel.com>
Date: Mon, 22 Mar 2021 23:37:29 +0000 (-0700)
Subject: dmaengine: idxd: fix opcap sysfs attribute output
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ea6a5735d2a61b938a302eb3629272342a9e7c46;p=linux.git

dmaengine: idxd: fix opcap sysfs attribute output

The operation capability register is 256bits. The current output only
prints out the first 64bits. Fix to output the entire 256bits. The current
code omits operation caps from IAX devices.

Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver")
Reported-by: Lucas Van <lucas.van@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161645624963.2003736.829798666998490151.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 4dbb03c545e48..c27ca01cf8b2e 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1449,8 +1449,14 @@ static ssize_t op_cap_show(struct device *dev,
 {
 	struct idxd_device *idxd =
 		container_of(dev, struct idxd_device, conf_dev);
+	int i, rc = 0;
+
+	for (i = 0; i < 4; i++)
+		rc += sysfs_emit_at(buf, rc, "%#llx ", idxd->hw.opcap.bits[i]);
 
-	return sprintf(buf, "%#llx\n", idxd->hw.opcap.bits[0]);
+	rc--;
+	rc += sysfs_emit_at(buf, rc, "\n");
+	return rc;
 }
 static DEVICE_ATTR_RO(op_cap);