diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2021-10-12 21:01:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:23:44 +0300 |
| commit | e509584b079a26ee57de1f47293e3ae0adfe0fd4 (patch) | |
| tree | 6093209e4ebef27495691bee65ee614ac76dc6af /drivers/dma | |
| parent | 41e360fa73a4c2f5b78f5ded78a5375b08c206a5 (diff) | |
| download | linux-e509584b079a26ee57de1f47293e3ae0adfe0fd4.tar.xz | |
dmaengine: idxd: check GENCAP config support for gencfg register
[ Upstream commit 79c4c3db7d86b9bec94562275efc82e58f3d0132 ]
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: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163406171896.1303830.11217958011385656998.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/idxd/device.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index b468ca36d3a0..3cda1c5faf3c 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -801,7 +801,7 @@ 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); |