This is a note to let you know that I've just added the patch titled
spi: omap2-mcspi: Correctly handle devm_clk_get_optional() errors
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-omap2-mcspi-correctly-handle-devm_clk_get_option.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c1774fe9ff1465d2b042c818b838b4b74a1d1461
Author: Mark Brown <broonie@xxxxxxxxxx>
Date: Fri Jan 17 16:16:03 2025 +0000
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@xxxxxxxxx>
Link: https://patch.msgid.link/20250117-spi-fix-omap2-optional-v1-1-e77d4ac6db6e@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Tested-by: Lars Pedersen <lapeddk@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 3cfd262c1abc2..35ca8fda45aae 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1521,10 +1521,15 @@ 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;
