[PATCH] IB/hfi1: kzalloc to kzalloc_flex

[Rosen Penev <rosenp@gmail.com>]

Combine kzalloc and kcalloc with a flexible array member. Avoids having
to free separately.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/infiniband/hw/hfi1/user_exp_rcv.c | 10 +---------
 drivers/infiniband/hw/hfi1/user_exp_rcv.h |  2 +-
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
index 5b01070ed66f..2597d311fb1f 100644
--- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c
+++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
@@ -257,7 +257,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 	if (tinfo->length == 0)
 		return -EINVAL;
 
-	tidbuf = kzalloc(sizeof(*tidbuf), GFP_KERNEL);
+	tidbuf = kzalloc_flex(*tidbuf, psets, uctxt->expected_count);
 	if (!tidbuf)
 		return -ENOMEM;
 
@@ -265,12 +265,6 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 	tidbuf->vaddr = tinfo->vaddr;
 	tidbuf->length = tinfo->length;
 	tidbuf->npages = num_user_pages(tidbuf->vaddr, tidbuf->length);
-	tidbuf->psets = kcalloc(uctxt->expected_count, sizeof(*tidbuf->psets),
-				GFP_KERNEL);
-	if (!tidbuf->psets) {
-		ret = -ENOMEM;
-		goto fail_release_mem;
-	}
 
 	if (fd->use_mn) {
 		ret = mmu_interval_notifier_insert(
@@ -448,7 +442,6 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 	if (fd->use_mn)
 		mmu_interval_notifier_remove(&tidbuf->notifier);
 	kfree(tidbuf->pages);
-	kfree(tidbuf->psets);
 	kfree(tidbuf);
 	kfree(tidlist);
 	return 0;
@@ -471,7 +464,6 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 		unpin_rcv_pages(fd, tidbuf, NULL, 0, pinned, false);
 fail_release_mem:
 	kfree(tidbuf->pages);
-	kfree(tidbuf->psets);
 	kfree(tidbuf);
 	kfree(tidlist);
 	return ret;
diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.h b/drivers/infiniband/hw/hfi1/user_exp_rcv.h
index 055726f7c139..b4a309a051f9 100644
--- a/drivers/infiniband/hw/hfi1/user_exp_rcv.h
+++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.h
@@ -22,8 +22,8 @@ struct tid_user_buf {
 	unsigned long length;
 	unsigned int npages;
 	struct page **pages;
-	struct tid_pageset *psets;
 	unsigned int n_psets;
+	struct tid_pageset psets[];
 };
 
 struct tid_rb_node {
-- 
2.53.0