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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2020-03-19 19:12:27 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-03-30 03:50:49 +0300 |
| commit | 1517f63cd84f00da3a3e21dff042410b2799c1c3 (patch) | |
| tree | a051ca2063818227b747b1071df88ff7691a067c /drivers/crypto/caam/jr.c | |
| parent | 8483c831b9f3fca2219ac45f361386a1233f6c9b (diff) | |
| download | linux-1517f63cd84f00da3a3e21dff042410b2799c1c3.tar.xz | |
crypto: caam - drop global context pointer and init_done
Leverage devres to get rid of code storing global context as well as
init_done flag.
Original code also has a circular deallocation dependency where
unregister_algs() -> caam_rng_exit() -> caam_jr_free() chain would
only happen if all of JRs were freed. Fix this by moving
caam_rng_exit() outside of unregister_algs() and doing it specifically
for JR that instantiated HWRNG.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Iuliana Prodan <iuliana.prodan@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-imx@nxp.com
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam/jr.c')
| -rw-r--r-- | drivers/crypto/caam/jr.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c index 88aff2aefd5d..4af22e7ceb4f 100644 --- a/drivers/crypto/caam/jr.c +++ b/drivers/crypto/caam/jr.c @@ -27,7 +27,8 @@ static struct jr_driver_data driver_data; static DEFINE_MUTEX(algs_lock); static unsigned int active_devs; -static void register_algs(struct device *dev) +static void register_algs(struct caam_drv_private_jr *jrpriv, + struct device *dev) { mutex_lock(&algs_lock); @@ -37,7 +38,7 @@ static void register_algs(struct device *dev) caam_algapi_init(dev); caam_algapi_hash_init(dev); caam_pkc_init(dev); - caam_rng_init(dev); + jrpriv->hwrng = !caam_rng_init(dev); caam_qi_algapi_init(dev); algs_unlock: @@ -53,7 +54,6 @@ static void unregister_algs(void) caam_qi_algapi_exit(); - caam_rng_exit(); caam_pkc_exit(); caam_algapi_hash_exit(); caam_algapi_exit(); @@ -135,6 +135,9 @@ static int caam_jr_remove(struct platform_device *pdev) jrdev = &pdev->dev; jrpriv = dev_get_drvdata(jrdev); + if (jrpriv->hwrng) + caam_rng_exit(jrdev->parent); + /* * Return EBUSY if job ring already allocated. */ @@ -514,7 +517,7 @@ static int caam_jr_probe(struct platform_device *pdev) int error; jrdev = &pdev->dev; - jrpriv = devm_kmalloc(jrdev, sizeof(*jrpriv), GFP_KERNEL); + jrpriv = devm_kzalloc(jrdev, sizeof(*jrpriv), GFP_KERNEL); if (!jrpriv) return -ENOMEM; @@ -590,7 +593,7 @@ static int caam_jr_probe(struct platform_device *pdev) atomic_set(&jrpriv->tfm_count, 0); - register_algs(jrdev->parent); + register_algs(jrpriv, jrdev->parent); return 0; } |