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crypto: qat - ignore subsequent state up commands

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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: 1bdc85550a ("crypto: qat - fix concurrency issue when device state changes")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Adam Guerin <adam.guerin@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu 2023-09-14 10:55:47 +01:00 committed by Herbert Xu
parent c362a58e8d
commit 9c20cb8b18
1 changed files with 3 additions and 1 deletions
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4
drivers/crypto/intel/qat/qat_common/adf_sysfs.c
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@ -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);