Patch "crypto: qat - fix unregistration of compression algorithms" has been added to the 6.5-stable tree

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This is a note to let you know that I've just added the patch titled

    crypto: qat - fix unregistration of compression algorithms

to the 6.5-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-fix-unregistration-of-compression-algorit.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 530f90477162ff7af7a2e8abbf1a9b81b5a46683
Author: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Date:   Thu Sep 14 10:55:49 2023 +0100

    crypto: qat - fix unregistration of compression algorithms
    
    [ Upstream commit 11af152f784d9eca54e193140891ac52de36e9a9 ]
    
    The function adf_dev_init(), through the subsystem qat_compression,
    populates the list of list of compression instances
    accel_dev->compression_list. If the list of instances is not empty,
    the function adf_dev_start() will then call qat_compression_registers()
    register the compression algorithms into the crypto framework.
    
    If any of the functions in adf_dev_start() fail, the caller of such
    function, in the error path calls adf_dev_down() which in turn call
    adf_dev_stop() and adf_dev_shutdown(), see for example the function
    state_store in adf_sriov.c.
    However, if the registration of compression algorithms is not done,
    adf_dev_stop() will try to unregister the algorithms regardless.
    This might cause the counter active_devs in qat_compression.c to get
    to a negative value.
    
    Add a new state, ADF_STATUS_COMPRESSION_ALGS_REGISTERED, which tracks
    if the compression algorithms are registered into the crypto framework.
    Then use this to unregister the algorithms if such flag is set. This
    ensures that the compression algorithms are only unregistered if
    previously registered.
    
    Fixes: 1198ae56c9a5 ("crypto: qat - expose deflate through acomp api for QAT GEN2")
    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_common_drv.h b/drivers/crypto/intel/qat/qat_common/adf_common_drv.h
index 7d3d67285ff8a..0af8606eac5b2 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_common_drv.h
+++ b/drivers/crypto/intel/qat/qat_common/adf_common_drv.h
@@ -26,6 +26,7 @@
 #define ADF_STATUS_PF_RUNNING 7
 #define ADF_STATUS_IRQ_ALLOCATED 8
 #define ADF_STATUS_CRYPTO_ALGS_REGISTERED 9
+#define ADF_STATUS_COMP_ALGS_REGISTERED 10
 
 enum adf_dev_reset_mode {
 	ADF_DEV_RESET_ASYNC = 0,
diff --git a/drivers/crypto/intel/qat/qat_common/adf_init.c b/drivers/crypto/intel/qat/qat_common/adf_init.c
index e4b823d21c505..67bdbee584991 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_init.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_init.c
@@ -218,6 +218,7 @@ static int adf_dev_start(struct adf_accel_dev *accel_dev)
 		clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 		return -EFAULT;
 	}
+	set_bit(ADF_STATUS_COMP_ALGS_REGISTERED, &accel_dev->status);
 
 	adf_dbgfs_add(accel_dev);
 
@@ -257,8 +258,10 @@ static void adf_dev_stop(struct adf_accel_dev *accel_dev)
 	}
 	clear_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status);
 
-	if (!list_empty(&accel_dev->compression_list))
+	if (!list_empty(&accel_dev->compression_list) &&
+	    test_bit(ADF_STATUS_COMP_ALGS_REGISTERED, &accel_dev->status))
 		qat_comp_algs_unregister();
+	clear_bit(ADF_STATUS_COMP_ALGS_REGISTERED, &accel_dev->status);
 
 	list_for_each(list_itr, &service_table) {
 		service = list_entry(list_itr, struct service_hndl, list);



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