linux-kernel - [PATCH 5.4 158/314] fpga: dfl: afu: Corrected error handling levels

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Message-Id: <20200623195346.395802943@linuxfoundation.org>
Date:   Tue, 23 Jun 2020 21:55:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Souptick Joarder <jrdr.linux@...il.com>,
        Wu Hao <hao.wu@...el.com>, Xu Yilun <yilun.xu@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 158/314] fpga: dfl: afu: Corrected error handling levels

From: Souptick Joarder <jrdr.linux@...il.com>

[ Upstream commit c9d7e3da1f3c4cf5dddfc5d7ce4d76d013aba1cc ]

Corrected error handling goto sequnece. Level put_pages should
be called when pinned pages >= 0 && pinned != npages. Level
free_pages should be called when pinned pages < 0.

Fixes: fa8dda1edef9 ("fpga: dfl: afu: add DFL_FPGA_PORT_DMA_MAP/UNMAP ioctls support")
Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
Acked-by: Wu Hao <hao.wu@...el.com>
Reviewed-by: Xu Yilun <yilun.xu@...el.com>
Link: https://lore.kernel.org/r/1589825991-3545-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/fpga/dfl-afu-dma-region.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c
index 62f924489db59..5942343a5d6ea 100644
--- a/drivers/fpga/dfl-afu-dma-region.c
+++ b/drivers/fpga/dfl-afu-dma-region.c
@@ -61,10 +61,10 @@ static int afu_dma_pin_pages(struct dfl_feature_platform_data *pdata,
 				     region->pages);
 	if (pinned < 0) {
 		ret = pinned;
-		goto put_pages;
+		goto free_pages;
 	} else if (pinned != npages) {
 		ret = -EFAULT;
-		goto free_pages;
+		goto put_pages;
 	}
 
 	dev_dbg(dev, "%d pages pinned\n", pinned);
-- 
2.25.1