From: Haibo Chen haibo.chen@nxp.com
stable inclusion from stable-5.10.47 commit 4b06ebab4a828c03e9a1ba9bbced505560f8aab6 bugzilla: 172973 https://gitee.com/openeuler/kernel/issues/I4DAKB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit f422316c8e9d3c4aff3c56549dfb44a677d02f14 ]
Move the register operation after the clock enable, otherwise system will stuck when this driver probe.
Fixes: 71d80563b076 ("spi: spi-nxp-fspi: fix fspi panic by unexpected interrupts") Signed-off-by: Haibo Chen haibo.chen@nxp.com Link: https://lore.kernel.org/r/1623317073-25158-1-git-send-email-haibo.chen@nxp.c... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/spi/spi-nxp-fspi.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index ab9035662717..bcc0b5a3a459 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -1033,12 +1033,6 @@ static int nxp_fspi_probe(struct platform_device *pdev) goto err_put_ctrl; }
- /* Clear potential interrupts */ - reg = fspi_readl(f, f->iobase + FSPI_INTR); - if (reg) - fspi_writel(f, reg, f->iobase + FSPI_INTR); - - /* find the resources - controller memory mapped space */ if (is_acpi_node(f->dev->fwnode)) res = platform_get_resource(pdev, IORESOURCE_MEM, 1); @@ -1076,6 +1070,11 @@ static int nxp_fspi_probe(struct platform_device *pdev) } }
+ /* Clear potential interrupts */ + reg = fspi_readl(f, f->iobase + FSPI_INTR); + if (reg) + fspi_writel(f, reg, f->iobase + FSPI_INTR); + /* find the irq */ ret = platform_get_irq(pdev, 0); if (ret < 0)