This is a note to let you know that I've just added the patch titled dmaengine: idxd: fix opcap sysfs attribute output to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dmaengine-idxd-fix-opcap-sysfs-attribute-output.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9815f7dd55470824e9127d7905dadb747faf91d0 Author: Dave Jiang <dave.jiang@xxxxxxxxx> Date: Mon Mar 22 16:37:29 2021 -0700 dmaengine: idxd: fix opcap sysfs attribute output [ Upstream commit ea6a5735d2a61b938a302eb3629272342a9e7c46 ] 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@xxxxxxxxx> Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx> Link: https://lore.kernel.org/r/161645624963.2003736.829798666998490151.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 4dbb03c545e4..c27ca01cf8b2 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);