Since commit 13a96935e6f6 ("spi: rockchip: Support 64-location deep
FIFOs"), get_fifo_len() return 64 or 32, never return 0, so remove
the excessive check in rockchip_spi_probe().

Fixes: 13a96935e6f6 ("spi: rockchip: Support 64-location deep FIFOs")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
---
 drivers/spi/spi-rockchip.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 0bb33c43b1b4..680fe6ef6acc 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -819,11 +819,6 @@ static int rockchip_spi_probe(struct platform_device *pdev)
 	}
 
 	rs->fifo_len = get_fifo_len(rs);
-	if (!rs->fifo_len) {
-		dev_err(&pdev->dev, "Failed to get fifo length\n");
-		ret = -EINVAL;
-		goto err_put_ctlr;
-	}
 
 	pm_runtime_set_autosuspend_delay(&pdev->dev, ROCKCHIP_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_use_autosuspend(&pdev->dev);
-- 
2.34.1

On Mon, Sep 23, 2024 at 07:55:16PM +0800, Jinjie Ruan wrote:
> Since commit 13a96935e6f6 ("spi: rockchip: Support 64-location deep
> FIFOs"), get_fifo_len() return 64 or 32, never return 0, so remove
> the excessive check in rockchip_spi_probe().
> 
> Fixes: 13a96935e6f6 ("spi: rockchip: Support 64-location deep FIFOs")

This is clearly not a bug fix, it's at most a code cleanup but...

> @@ -819,11 +819,6 @@ static int rockchip_spi_probe(struct platform_device *pdev)
>  	}
>  
>  	rs->fifo_len = get_fifo_len(rs);
> -	if (!rs->fifo_len) {
> -		dev_err(&pdev->dev, "Failed to get fifo length\n");
> -		ret = -EINVAL;
> -		goto err_put_ctlr;
> -	}

...given that the probe() path isn't exactly a hot path is there really
any benefit from this, if someone does add the option of returning 0
it'll silently break.