linux-kernel - [PATCH 03/11] staging: gasket: page table: remove dead code in coherent mem alloc

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Message-Id: <20181015045927.156790-4-toddpoynor@gmail.com>
Date:   Sun, 14 Oct 2018 21:59:19 -0700
From:   Todd Poynor <toddpoynor@...il.com>
To:     Rob Springer <rspringer@...gle.com>,
        Ben Chan <benchan@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Todd Poynor <toddpoynor@...gle.com>
Subject: [PATCH 03/11] staging: gasket: page table: remove dead code in coherent mem alloc

From: Todd Poynor <toddpoynor@...gle.com>

gasket_alloc_coherent_memory() has some unnecessary code related to out
of memory checking that will never hit the condition checked, remove.

Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
---
 drivers/staging/gasket/gasket_page_table.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index 2e1de8ad4a2c6..985a3a93499d5 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -1316,7 +1316,6 @@ int gasket_alloc_coherent_memory(struct gasket_dev *gasket_dev, u64 size,
 			GFP_KERNEL);
 	if (!gasket_dev->page_table[index]->coherent_pages)
 		goto nomem;
-	*dma_address = 0;
 
 	gasket_dev->coherent_buffer.length_bytes =
 		PAGE_SIZE * (num_pages);
@@ -1331,15 +1330,12 @@ int gasket_alloc_coherent_memory(struct gasket_dev *gasket_dev, u64 size,
 			(u64)mem + j * PAGE_SIZE;
 	}
 
-	if (*dma_address == 0)
-		goto nomem;
 	return 0;
 
 nomem:
-	if (mem) {
+	if (mem)
 		dma_free_coherent(gasket_get_device(gasket_dev),
 				  num_pages * PAGE_SIZE, mem, handle);
-	}
 
 	kfree(gasket_dev->page_table[index]->coherent_pages);
 	gasket_dev->page_table[index]->coherent_pages = NULL;
-- 
2.19.0.605.g01d371f741-goog