From mboxrd@z Thu Jan 1 00:00:00 1970 From: moritz.fischer@ettus.com (Moritz Fischer) Date: Thu, 22 Oct 2015 11:56:09 -0700 Subject: [PATCH] fpga: zynq-fpga: Fix issue with drvdata being overwritten. Message-ID: <1445540169-20715-1-git-send-email-moritz.fischer@ettus.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Upon registering a FPGA Manager low level driver, FPGA Manager core overwrites the platform drvdata pointer. Prior to this commit zynq-fpga falsely relied on this pointer to still be valid at remove() time. Reported-by: Alan Tull Signed-off-by: Moritz Fischer --- drivers/fpga/zynq-fpga.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c index 31db550..c2fb412 100644 --- a/drivers/fpga/zynq-fpga.c +++ b/drivers/fpga/zynq-fpga.c @@ -416,7 +416,6 @@ static int zynq_fpga_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; - platform_set_drvdata(pdev, priv); priv->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -477,10 +476,12 @@ static int zynq_fpga_probe(struct platform_device *pdev) static int zynq_fpga_remove(struct platform_device *pdev) { struct zynq_fpga_priv *priv; + struct fpga_manager *mgr; - fpga_mgr_unregister(&pdev->dev); + mgr = platform_get_drvdata(pdev); + priv = mgr->priv; - priv = platform_get_drvdata(pdev); + fpga_mgr_unregister(&pdev->dev); clk_unprepare(priv->clk); -- 2.6.2