From db23b7b5ca3ebba735df3f9bff0ae0caedce71ec Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Mon, 22 Mar 2021 16:37:29 -0700 Subject: [PATCH] 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 Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/161645624963.2003736.829798666998490151.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/sysfs.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index fb97c9f319a5..b3ab86ced355 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1259,8 +1259,14 @@ 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; - return sprintf(buf, "%#llx\n", idxd->hw.opcap.bits[0]); + for (i = 0; i < 4; i++) + rc += sysfs_emit_at(buf, rc, "%#llx ", idxd->hw.opcap.bits[i]); + + rc--; + rc += sysfs_emit_at(buf, rc, "\n"); + return rc; } static DEVICE_ATTR_RO(op_cap);