[tip: irq/msi] bus: fsl-mc-msi: Allocate MSI device data on first use

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the irq/msi branch of tip:

Commit-ID:     86ca622628d3941835138f2f89e69ed63f7f50fe
Gitweb:        https://git.kernel.org/tip/86ca622628d3941835138f2f89e69ed63f7f50fe
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Fri, 10 Dec 2021 23:19:00 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 16 Dec 2021 22:16:38 +01:00

bus: fsl-mc-msi: Allocate MSI device data on first use

Allocate the MSI device data on first invocation of the allocation function.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211210221813.867985931@xxxxxxxxxxxxx

---
 drivers/bus/fsl-mc/fsl-mc-msi.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/bus/fsl-mc/fsl-mc-msi.c b/drivers/bus/fsl-mc/fsl-mc-msi.c
index cf97487..c6215b7 100644
--- a/drivers/bus/fsl-mc/fsl-mc-msi.c
+++ b/drivers/bus/fsl-mc/fsl-mc-msi.c
@@ -253,6 +253,14 @@ int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
 	struct irq_domain *msi_domain;
 	int error;
 
+	msi_domain = dev_get_msi_domain(dev);
+	if (!msi_domain)
+		return -EINVAL;
+
+	error = msi_setup_device_data(dev);
+	if (error)
+		return error;
+
 	if (!list_empty(dev_to_msi_list(dev)))
 		return -EINVAL;
 
@@ -260,12 +268,6 @@ int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
 	if (error < 0)
 		return error;
 
-	msi_domain = dev_get_msi_domain(dev);
-	if (!msi_domain) {
-		error = -EINVAL;
-		goto cleanup_msi_descs;
-	}
-
 	/*
 	 * NOTE: Calling this function will trigger the invocation of the
 	 * its_fsl_mc_msi_prepare() callback