This is a note to let you know that I've just added the patch titled
crypto: qat - ignore subsequent state up commands
to the 6.6-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:
crypto-qat-ignore-subsequent-state-up-commands.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b92ffcb6fb8e158de2a5e226d7358c425882f8dd
Author: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Date: Thu Sep 14 10:55:47 2023 +0100
crypto: qat - ignore subsequent state up commands
[ Upstream commit 9c20cb8b1847dedddec3d5163079290542bf00bf ]
If the device is already in the up state, a subsequent write of `up` to
the sysfs attribute /sys/bus/pci/devices/<BDF>/qat/state brings the
device down.
Fix this behaviour by ignoring subsequent `up` commands if the device is
already in the up state.
Fixes: 1bdc85550a2b ("crypto: qat - fix concurrency issue when device state changes")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Reviewed-by: Adam Guerin <adam.guerin@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/crypto/intel/qat/qat_common/adf_sysfs.c b/drivers/crypto/intel/qat/qat_common/adf_sysfs.c
index a8f33558d7cb8..8880af1aa1b5b 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_sysfs.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_sysfs.c
@@ -68,7 +68,9 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr,
dev_info(dev, "Starting device qat_dev%d\n", accel_id);
ret = adf_dev_up(accel_dev, true);
- if (ret < 0) {
+ if (ret == -EALREADY) {
+ break;
+ } else if (ret) {
dev_err(dev, "Failed to start device qat_dev%d\n",
accel_id);
adf_dev_down(accel_dev, true);
