[PATCH] dmaengine: idxd: sysfs input of wq incorrect wq type should return error
From: Dave Jiang <dave.jiang@intel.com>
Date: 2020-02-19 17:24:10
Subsystem:
dma generic offload engine subsystem, intel idxd driver, the rest · Maintainers:
Vinod Koul, Vinicius Costa Gomes, Linus Torvalds
Currently when inputing an unrecognized wq type, we set the wq type to
"none". It really should return error and not change the existing wq type
that's in the kernel.
Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver")
Reported-by: Yixin Zhang <redacted>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/idxd/sysfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index edbfe83325eb..b4a7885e79ed 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c@@ -1002,12 +1002,14 @@ static ssize_t wq_type_store(struct device *dev, return -EPERM; old_type = wq->type; - if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL])) + if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE])) + wq->type = IDXD_WQT_NONE; + else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL])) wq->type = IDXD_WQT_KERNEL; else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER])) wq->type = IDXD_WQT_USER; else - wq->type = IDXD_WQT_NONE; + return -EINVAL; /* If we are changing queue type, clear the name */ if (wq->type != old_type)