6.6-stable review patch. If anyone has any objections, please let me know.
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From: Anurag Dutta a-dutta@ti.com
[ Upstream commit 1889dd2081975ce1f6275b06cdebaa8d154847a9 ]
When cqspi_request_mmap_dma() returns -EPROBE_DEFER after runtime PM is enabled, the error path calls clk_disable_unprepare() on an already disabled clock, causing an imbalance.
Use pm_runtime_get_sync() to increment the usage counter and resume the device. This prevents runtime_suspend() from being invoked and causing a double clock disable.
Fixes: 140623410536 ("mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller") Signed-off-by: Anurag Dutta a-dutta@ti.com Tested-by: Nishanth Menon nm@ti.com Link: https://patch.msgid.link/20251212072312.2711806-3-a-dutta@ti.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-cadence-quadspi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index 7b809644436e..eed88aba2cfe 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1885,7 +1885,9 @@ static int cqspi_probe(struct platform_device *pdev) probe_reset_failed: if (cqspi->is_jh7110) cqspi_jh7110_disable_clk(pdev, cqspi); - clk_disable_unprepare(cqspi->clk); + + if (pm_runtime_get_sync(&pdev->dev) >= 0) + clk_disable_unprepare(cqspi->clk); probe_clk_failed: pm_runtime_put_sync(dev); probe_pm_failed: