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| author | Mark Brown <broonie@kernel.org> | 2025-01-17 16:16:03 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-08 09:57:52 +0100 |
| commit | 4c22e09c656609c9d71a11cf7bbfc6dc8509dee3 (patch) | |
| tree | ee1ba12692d0337404c43da992bac61cb402adb7 | |
| parent | d5d33f01b86af44b23eea61ee309e4ef22c0cdfe (diff) | |
| download | linux-4c22e09c656609c9d71a11cf7bbfc6dc8509dee3.tar.gz linux-4c22e09c656609c9d71a11cf7bbfc6dc8509dee3.tar.bz2 linux-4c22e09c656609c9d71a11cf7bbfc6dc8509dee3.zip | |
spi: omap2-mcspi: Correctly handle devm_clk_get_optional() errors
[ Upstream commit a07eb4f67ed085f32002a1af2b6073546d67de3f ]
devm_clk_get_optional() returns NULL for missing clocks and a PTR_ERR()
if there is a clock but we fail to get it, but currently we only handle
the latter case and do so as though the clock was missing. If we get an
error back we should handle that as an error since the clock exists but
we failed to get it, if we get NULL then the clock doesn't exist and we
should handle that.
Fixes: 4c6ac5446d06 ("spi: omap2-mcspi: Fix the IS_ERR() bug for devm_clk_get_optional_enabled()")
Reported-by: Lars Pedersen <lapeddk@gmail.com>
Link: https://patch.msgid.link/20250117-spi-fix-omap2-optional-v1-1-e77d4ac6db6e@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Tested-by: Lars Pedersen <lapeddk@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/spi/spi-omap2-mcspi.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 4a2f84c4d22e..532b2e9c31d0 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -1561,10 +1561,15 @@ static int omap2_mcspi_probe(struct platform_device *pdev) } mcspi->ref_clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); - if (IS_ERR(mcspi->ref_clk)) - mcspi->ref_clk_hz = OMAP2_MCSPI_MAX_FREQ; - else + if (IS_ERR(mcspi->ref_clk)) { + status = PTR_ERR(mcspi->ref_clk); + dev_err_probe(&pdev->dev, status, "Failed to get ref_clk"); + goto free_ctlr; + } + if (mcspi->ref_clk) mcspi->ref_clk_hz = clk_get_rate(mcspi->ref_clk); + else + mcspi->ref_clk_hz = OMAP2_MCSPI_MAX_FREQ; ctlr->max_speed_hz = mcspi->ref_clk_hz; ctlr->min_speed_hz = mcspi->ref_clk_hz >> 15; |