From: Moritz Fischer Date: Thu, 22 Oct 2015 18:56:09 +0000 (-0700) Subject: fpga: zynq-fpga: Fix issue with drvdata being overwritten. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=28f98a12f7bac9c3e5ba85d245d32ec0910cf8e5;p=linux-beck.git fpga: zynq-fpga: Fix issue with drvdata being overwritten. 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 Acked-by: Alan Tull Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c index 31db5509f3d4..c2fb4120bd62 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);