This is a note to let you know that I've just added the patch titled
dmaengine: idxd: Modify the dependence of attribute pasid_enabled
to the 6.4-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-modify-the-dependence-of-attribute-pa.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3a64eaef3f52dec77c854c670be653eb25071ddb
Author: Rex Zhang <rex.zhang@xxxxxxxxx>
Date: Wed Jun 14 14:27:06 2023 +0800
dmaengine: idxd: Modify the dependence of attribute pasid_enabled
[ Upstream commit 50c5e6f41d5ad7c731c31135a30d0e4f0e4fea26 ]
Kernel PASID and user PASID are separately enabled. User needs to know the
user PASID enabling status to decide how to use IDXD device in user space.
This is done via the attribute /sys/bus/dsa/devices/dsa0/pasid_enabled.
It's unnecessary for user to know the kernel PASID enabling status because
user won't use the kernel PASID. But instead of showing the user PASID
enabling status, the attribute shows the kernel PASID enabling status. Fix
the issue by showing the user PASID enabling status in the attribute.
Fixes: 42a1b73852c4 ("dmaengine: idxd: Separate user and kernel pasid enabling")
Signed-off-by: Rex Zhang <rex.zhang@xxxxxxxxx>
Acked-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Acked-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230614062706.1743078-1-rex.zhang@xxxxxxxxx
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 293739ac55969..b6a0a12412afd 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1480,7 +1480,7 @@ static ssize_t pasid_enabled_show(struct device *dev,
{
struct idxd_device *idxd = confdev_to_idxd(dev);
- return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
+ return sysfs_emit(buf, "%u\n", device_user_pasid_enabled(idxd));
}
static DEVICE_ATTR_RO(pasid_enabled);
