staging/rdma/hfi1: Add unit # to verbs txreq cache name

jubinjohn · gregkh · commit 64ffd86cf9c1 · 2015-10-27T17:45:51.000+09:00
The name used to create the verbs txreq cache was not qualified with the unit
number. This causes a panic when destroying the cache on a dual HFI systems.
Create a unique name with the unit number with this patch

Reviewed-by: Mike Marciniszyn &lt;mike.marciniszyn@intel.com&gt;
Signed-off-by: Jubin John &lt;jubin.john@intel.com&gt;
Signed-off-by: Ira Weiny &lt;ira.weiny@intel.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/staging/rdma/hfi1/verbs.c b/drivers/staging/rdma/hfi1/verbs.c
@@ -129,6 +129,9 @@ static void verbs_sdma_complete(
 	int status,
 	int drained);
 
+/* Length of buffer to create verbs txreq cache name */
+#define TXREQ_NAME_LEN 24
+
 /*
  * Note that it is OK to post send work requests in the SQE and ERR
  * states; hfi1_do_send() will process them and generate error
@@ -1905,6 +1908,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
 	int ret;
 	size_t lcpysz = IB_DEVICE_NAME_MAX;
 	u16 descq_cnt;
+	char buf[TXREQ_NAME_LEN];
 
 	ret = hfi1_qp_init(dev);
 	if (ret)
@@ -1958,8 +1962,9 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
 
 	descq_cnt = sdma_get_descq_cnt();
 
+	snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit);
 	/* SLAB_HWCACHE_ALIGN for AHG */
-	dev->verbs_txreq_cache = kmem_cache_create("hfi1_vtxreq_cache",
+	dev->verbs_txreq_cache = kmem_cache_create(buf,
 						   sizeof(struct verbs_txreq),
 						   0, SLAB_HWCACHE_ALIGN,
 						   verbs_txreq_kmem_cache_ctor);
