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Commit 8f5ea2df authored by Tadeusz Struk's avatar Tadeusz Struk Committed by Herbert Xu
Browse files

crypto: qat - Don't attempt to register algorithm multiple times 



When multiple devices are present in the system the driver attempts
to register the same algorithm many times.

Changes in v2:
 - use proper synchronization mechanizm between register and unregister

Signed-off-by: default avatarTadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 3cf080a7

drivers/crypto/qat/qat_common/qat_asym_algs.c

+16 −3
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ 
#include "adf_common_drv.h"

#include "qat_crypto.h"



static DEFINE_MUTEX(algs_lock);

static unsigned int active_devs;



struct qat_rsa_input_params {

	union {

		struct {
@@ -629,11 +632,21 @@ static struct akcipher_alg rsa = { 


int qat_asym_algs_register(void)

{

	int ret = 0;



	mutex_lock(&algs_lock);

	if (++active_devs == 1) {

		rsa.base.cra_flags = 0;

	return crypto_register_akcipher(&rsa);

		ret = crypto_register_akcipher(&rsa);

	}

	mutex_unlock(&algs_lock);

	return ret;

}



void qat_asym_algs_unregister(void)

{

	mutex_lock(&algs_lock);

	if (--active_devs == 0)

		crypto_unregister_akcipher(&rsa);

	mutex_unlock(&algs_lock);

}