diff options
authorTobias Klauser <tklauser@distanz.ch>2017-04-24 16:34:20 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-04-26 11:38:56 +0200
commitd721f9bbe6a7d9543f560053f8be5237e7db18e9 (patch)
parent139752a210544dd02bac5c21322751de300ece93 (diff)
fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe()
If either _alt_hps2fpga_enable_set() or fpga_bridge_register() fail in alt_fpga_bridge_probe(), the clock remains enabled and prepared. Also, in the error path for _alt_hps2fpga_enable_set() a call to fpga_bridge_unregister() is made even though the bridge was not registered yet. Remove the unnecessary call to fpga_bridge_unregister() and call clk_disable_unprepare() in both error paths in order to make sure the clock gets properly disabled and unprepared. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/fpga/altera-hps2fpga.c b/drivers/fpga/altera-hps2fpga.c
index 4b354c79be31..3066b805f2d0 100644
--- a/drivers/fpga/altera-hps2fpga.c
+++ b/drivers/fpga/altera-hps2fpga.c
@@ -181,15 +181,18 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
(enable ? "enabling" : "disabling"));
ret = _alt_hps2fpga_enable_set(priv, enable);
- if (ret) {
- fpga_bridge_unregister(&pdev->dev);
- return ret;
- }
+ if (ret)
+ goto err;
- return fpga_bridge_register(dev, priv->name, &altera_hps2fpga_br_ops,
- priv);
+ ret = fpga_bridge_register(dev, priv->name, &altera_hps2fpga_br_ops,
+ priv);
+ if (ret)
+ clk_disable_unprepare(priv->clk);
+ return ret;
static int alt_fpga_bridge_remove(struct platform_device *pdev)

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