From: Michael Walle <michael@walle.cc>
Date: Wed, 10 Feb 2021 21:42:29 +0000 (+0100)
Subject: fpga: zynqpl: fix buffer alignment
X-Git-Url: http://git.dujemihanovic.xyz/%7B%7B%20%24style.RelPermalink%20%7D%7D?a=commitdiff_plain;h=8c02d842b61ebd579e42ff3f0326457e7d10ec95;p=u-boot.git

fpga: zynqpl: fix buffer alignment

Due to pointer arithmetic, "sizeof(u32) * ARCH_DMA_MINALIGN" is
subtracted. It seems that the original intention was to just subtract
ARCH_DMA_MINALIGN. Fix it.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index a11e485525..2de40109a8 100644
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -315,7 +315,7 @@ static u32 *zynq_align_dma_buffer(u32 *buf, u32 len, u32 swap)
 		if (new_buf > buf) {
 			debug("%s: Aligned buffer is after buffer start\n",
 			      __func__);
-			new_buf -= ARCH_DMA_MINALIGN;
+			new_buf = (u32 *)((u32)new_buf - ARCH_DMA_MINALIGN);
 		}
 		printf("%s: Align buffer at %x to %x(swap %d)\n", __func__,
 		       (u32)buf, (u32)new_buf, swap);