[PATCH v2 2/2] crypto:chcr- Check device is allocated before use

[Harsh Jain]

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

Signed-off-by: Atul Gupta <atul.gu...@chelsio.com>
---
 drivers/crypto/chelsio/chcr_core.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/crypto/chelsio/chcr_core.c 
b/drivers/crypto/chelsio/chcr_core.c
index 918da8e..1c65f07 100644
--- a/drivers/crypto/chelsio/chcr_core.c
+++ b/drivers/crypto/chelsio/chcr_core.c
@@ -52,6 +52,7 @@
 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;
        }
-
-       *dev = u_ctx->dev;
        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;
 }
-- 
1.8.2.3

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