Commit 79c4c3db authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

dmaengine: idxd: check GENCAP config support for gencfg register 



DSA spec 1.2 has moved the GENCFG register under the GENCAP configuration
support with respect to writability. Add check in driver before writing to
GENCFG register.

Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163406171896.1303830.11217958011385656998.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent adec566b

drivers/dma/idxd/device.c

+1 −1
Original line number Diff line number Diff line
@@ -791,7 +791,7 @@ static int idxd_groups_config_write(struct idxd_device *idxd) 
	struct device *dev = &idxd->pdev->dev;



	/* Setup bandwidth token limit */

	if (idxd->token_limit) {

	if (idxd->hw.gen_cap.config_en && idxd->token_limit) {

		reg.bits = ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET);

		reg.token_limit = idxd->token_limit;

		iowrite32(reg.bits, idxd->reg_base + IDXD_GENCFG_OFFSET);