diff options
| author | Rajan Vaja <rajan.vaja@xilinx.com> | 2018-12-04 15:51:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 13:02:38 +0300 |
| commit | eca42d4cf3c591c36312c52707e0a712e0c7256a (patch) | |
| tree | 665bb9899f868b34e13cda6e63626f058dd30100 /drivers/tty/serial/xilinx_uartps.c | |
| parent | a1fee899e5bed457afc20a6a2ff3915a95cc5942 (diff) | |
| download | linux-eca42d4cf3c591c36312c52707e0a712e0c7256a.tar.xz | |
tty: xilinx_uartps: Correct return value in probe
Existing driver checks for alternate clock if devm_clk_get() fails
and returns error code for last clock failure. If xilinx_uartps is
called before clock driver, devm_clk_get() returns -EPROBE_DEFER.
In this case, probe should not check for alternate clock as main
clock is already present in DTS and return -EPROBE_DEFER only.
This patch fixes it by not checking for alternate clock when main
clock get returns -EPROBE_DEFER.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 379242b96790..4f8edb1661cb 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1545,27 +1545,25 @@ static int cdns_uart_probe(struct platform_device *pdev) } cdns_uart_data->pclk = devm_clk_get(&pdev->dev, "pclk"); + if (PTR_ERR(cdns_uart_data->pclk) == -EPROBE_DEFER) + return PTR_ERR(cdns_uart_data->pclk); + if (IS_ERR(cdns_uart_data->pclk)) { cdns_uart_data->pclk = devm_clk_get(&pdev->dev, "aper_clk"); - if (!IS_ERR(cdns_uart_data->pclk)) - dev_err(&pdev->dev, "clock name 'aper_clk' is deprecated.\n"); - } - if (IS_ERR(cdns_uart_data->pclk)) { - dev_err(&pdev->dev, "pclk clock not found.\n"); - rc = PTR_ERR(cdns_uart_data->pclk); - goto err_out_unregister_driver; + if (IS_ERR(cdns_uart_data->pclk)) + return PTR_ERR(cdns_uart_data->pclk); + dev_err(&pdev->dev, "clock name 'aper_clk' is deprecated.\n"); } cdns_uart_data->uartclk = devm_clk_get(&pdev->dev, "uart_clk"); + if (PTR_ERR(cdns_uart_data->uartclk) == -EPROBE_DEFER) + return PTR_ERR(cdns_uart_data->uartclk); + if (IS_ERR(cdns_uart_data->uartclk)) { cdns_uart_data->uartclk = devm_clk_get(&pdev->dev, "ref_clk"); - if (!IS_ERR(cdns_uart_data->uartclk)) - dev_err(&pdev->dev, "clock name 'ref_clk' is deprecated.\n"); - } - if (IS_ERR(cdns_uart_data->uartclk)) { - dev_err(&pdev->dev, "uart_clk clock not found.\n"); - rc = PTR_ERR(cdns_uart_data->uartclk); - goto err_out_unregister_driver; + if (IS_ERR(cdns_uart_data->uartclk)) + return PTR_ERR(cdns_uart_data->uartclk); + dev_err(&pdev->dev, "clock name 'ref_clk' is deprecated.\n"); } rc = clk_prepare_enable(cdns_uart_data->pclk); |