Messages in this thread Patch in this message | | | From | Tobias Klauser <> | Subject | [PATCH] fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe() | Date | Tue, 11 Apr 2017 11:22:54 +0200 |
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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> --- drivers/fpga/altera-hps2fpga.c | 15 +++++++++------ 1 file 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); +err: + if (ret) + clk_disable_unprepare(priv->clk); + + return ret; } static int alt_fpga_bridge_remove(struct platform_device *pdev) -- 2.12.2
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