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crypto: qat - ignore subsequent state up commands
[ Upstream commit9c20cb8b18
] 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> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 3 additions and 1 deletions
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@ -68,7 +68,9 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr,
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dev_info(dev, "Starting device qat_dev%d\n", accel_id);
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ret = adf_dev_up(accel_dev, true);
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if (ret < 0) {
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if (ret == -EALREADY) {
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break;
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} else if (ret) {
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dev_err(dev, "Failed to start device qat_dev%d\n",
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accel_id);
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adf_dev_down(accel_dev, true);
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