forked from Minki/linux
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>
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@ -52,6 +52,7 @@ static struct cxgb4_uld_info chcr_uld_info = {
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int assign_chcr_device(struct chcr_dev **dev)
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{
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struct uld_ctx *u_ctx;
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int ret = -ENXIO;
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/*
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* Which device to use if multiple devices are available TODO
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@ -59,15 +60,14 @@ int assign_chcr_device(struct chcr_dev **dev)
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* must go to the same device to maintain the ordering.
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*/
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mutex_lock(&dev_mutex); /* TODO ? */
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u_ctx = list_first_entry(&uld_ctx_list, struct uld_ctx, entry);
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if (!u_ctx) {
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mutex_unlock(&dev_mutex);
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return -ENXIO;
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list_for_each_entry(u_ctx, &uld_ctx_list, entry)
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if (u_ctx && u_ctx->dev) {
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*dev = u_ctx->dev;
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ret = 0;
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break;
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}
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*dev = u_ctx->dev;
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mutex_unlock(&dev_mutex);
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return 0;
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return ret;
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}
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static int chcr_dev_add(struct uld_ctx *u_ctx)
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@ -202,10 +202,8 @@ static int chcr_uld_state_change(void *handle, enum cxgb4_state state)
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static int __init chcr_crypto_init(void)
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{
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if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info)) {
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if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info))
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pr_err("ULD register fail: No chcr crypto support in cxgb4");
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return -1;
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}
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return 0;
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}
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