media: imx-jpeg: Disable useless interrupt to avoid kernel panic

[ Upstream commit c3720e65c9013a7b2a5dbb63e6bf6d74a35dd894 ]

There is a hardware bug that the interrupt STMBUF_HALF may be triggered
after or when disable interrupt.
It may led to unexpected kernel panic.
And interrupt STMBUF_HALF and STMBUF_RTND have no other effect.
So disable them and the unused interrupts.

meanwhile clear the interrupt status when disable interrupt.

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Reviewed-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c
index 718b7b08f93e0148ef7848297ac68d6a78fef5f2..8936d5ce886c218d5b8028af97928e9c2cc53e0f 100644 (file)
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c
@@ -76,12 +76,14 @@ void print_wrapper_info(struct device *dev, void __iomem *reg)
 
 void mxc_jpeg_enable_irq(void __iomem *reg, int slot)
 {
-       writel(0xFFFFFFFF, reg + MXC_SLOT_OFFSET(slot, SLOT_IRQ_EN));
+       writel(0xFFFFFFFF, reg + MXC_SLOT_OFFSET(slot, SLOT_STATUS));
+       writel(0xF0C, reg + MXC_SLOT_OFFSET(slot, SLOT_IRQ_EN));
 }
 
 void mxc_jpeg_disable_irq(void __iomem *reg, int slot)
 {
        writel(0x0, reg + MXC_SLOT_OFFSET(slot, SLOT_IRQ_EN));
+       writel(0xFFFFFFFF, reg + MXC_SLOT_OFFSET(slot, SLOT_STATUS));
 }
 
 void mxc_jpeg_sw_reset(void __iomem *reg)