From d7780d73607f10d3e5d43537c46beb679ae6f6dc Mon Sep 17 00:00:00 2001
From: lean <coolsnowwolf@gmail.com>
Date: Thu, 7 Apr 2022 18:38:21 +0800
Subject: [PATCH] mhi: use irq_flags if controller driver configures it

---
 .../hack-5.10/994-mhi-use-irq-flags.patch     | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 target/linux/generic/hack-5.10/994-mhi-use-irq-flags.patch

diff --git a/target/linux/generic/hack-5.10/994-mhi-use-irq-flags.patch b/target/linux/generic/hack-5.10/994-mhi-use-irq-flags.patch
new file mode 100644
index 000000000..07cbf4434
--- /dev/null
+++ b/target/linux/generic/hack-5.10/994-mhi-use-irq-flags.patch
@@ -0,0 +1,47 @@
+--- a/drivers/bus/mhi/core/init.c
++++ b/drivers/bus/mhi/core/init.c
+@@ -151,12 +151,17 @@ int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
+ {
+ 	struct mhi_event *mhi_event = mhi_cntrl->mhi_event;
+ 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
++	unsigned long irq_flags = IRQF_SHARED | IRQF_NO_SUSPEND;
+ 	int i, ret;
+ 
++	/* if controller driver has set irq_flags, use it */
++	if (mhi_cntrl->irq_flags)
++		irq_flags = mhi_cntrl->irq_flags;
++
+ 	/* Setup BHI_INTVEC IRQ */
+ 	ret = request_threaded_irq(mhi_cntrl->irq[0], mhi_intvec_handler,
+ 				   mhi_intvec_threaded_handler,
+-				   IRQF_SHARED | IRQF_NO_SUSPEND,
++				   irq_flags,
+ 				   "bhi", mhi_cntrl);
+ 	if (ret)
+ 		return ret;
+@@ -174,7 +179,7 @@ int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
+ 
+ 		ret = request_irq(mhi_cntrl->irq[mhi_event->irq],
+ 				  mhi_irq_handler,
+-				  IRQF_SHARED | IRQF_NO_SUSPEND,
++				  irq_flags,
+ 				  "mhi", mhi_event);
+ 		if (ret) {
+ 			dev_err(dev, "Error requesting irq:%d for ev:%d\n",
+--- a/include/linux/mhi.h
++++ b/include/linux/mhi.h
+@@ -353,6 +353,7 @@ struct mhi_controller_config {
+  * @fbc_download: MHI host needs to do complete image transfer (optional)
+  * @pre_init: MHI host needs to do pre-initialization before power up
+  * @wake_set: Device wakeup set flag
++ * @irq_flags: irq flags passed to request_irq (optional)
+  *
+  * Fields marked as (required) need to be populated by the controller driver
+  * before calling mhi_register_controller(). For the fields marked as (optional)
+@@ -444,6 +445,7 @@ struct mhi_controller {
+ 	bool fbc_download;
+ 	bool pre_init;
+ 	bool wake_set;
++	unsigned long irq_flags;
+ };
+ 
\ No newline at end of file