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crypto: chcr - Check device is allocated before use 

Ensure dev is allocated for crypto uld context before using the device
for crypto operations.

Cc: <stable@vger.kernel.org>
Signed-off-by: Atul Gupta <atul.gupta@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Harsh Jain 2017-01-24 10:34:33 +05:30 committed by Herbert Xu
parent 94e1dab1c9
commit f5f7bebc91
1 changed files with 8 additions and 10 deletions
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18
drivers/crypto/chelsio/chcr_core.c
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@ -52,6 +52,7 @@ static struct cxgb4_uld_info chcr_uld_info = {
int assign_chcr_device(struct chcr_dev **dev)
{
struct uld_ctx *u_ctx;
int ret = -ENXIO;
/*
* Which device to use if multiple devices are available TODO
@ -59,15 +60,14 @@ int assign_chcr_device(struct chcr_dev **dev)
* must go to the same device to maintain the ordering.
*/
mutex_lock(&dev_mutex); /* TODO ? */
u_ctx = list_first_entry(&uld_ctx_list, struct uld_ctx, entry);
if (!u_ctx) {
mutex_unlock(&dev_mutex);
return -ENXIO;
}
list_for_each_entry(u_ctx, &uld_ctx_list, entry)
if (u_ctx && u_ctx->dev) {
*dev = u_ctx->dev;
ret = 0;
break;
}
mutex_unlock(&dev_mutex);
return 0;
return ret;
}
static int chcr_dev_add(struct uld_ctx *u_ctx)
@ -202,10 +202,8 @@ static int chcr_uld_state_change(void *handle, enum cxgb4_state state)
static int __init chcr_crypto_init(void)
{
if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info)) {
if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info))
pr_err("ULD register fail: No chcr crypto support in cxgb4");
return -1;
}
return 0;
}