linux-kernel - [PATCH V4 8/8] i3c: master: svc: enable the interrupt in the enable ibi function

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Message-Id: <20210809063645.2289988-9-xiaoning.wang@nxp.com>
Date:   Mon,  9 Aug 2021 14:36:45 +0800
From:   Clark Wang <xiaoning.wang@....com>
To:     miquel.raynal@...tlin.com, conor.culhane@...vaco.com,
        alexandre.belloni@...tlin.com
Cc:     linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com
Subject: [PATCH V4 8/8] i3c: master: svc: enable the interrupt in the enable ibi function

If enable interrupt in the svc_i3c_master_bus_init() but do not call
enable ibi in the device driver, it will cause a kernel dump in the
svc_i3c_master_handle_ibi() when a slave start occurs on the i3c bus,
because the data->ibi_pool is not initialized.
So only enable the interrupt in svc_i3c_master_enable_ibi() function.

Signed-off-by: Clark Wang <xiaoning.wang@....com>
---
V4: New patch in this patchset
---
 drivers/i3c/master/svc-i3c-master.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 77f67d407acd..b802afd8eb7d 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -569,8 +569,6 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
 	if (ret)
 		goto rpm_out;
 
-	svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
-
 rpm_out:
 	pm_runtime_mark_last_busy(master->dev);
 	pm_runtime_put_autosuspend(master->dev);
@@ -1398,6 +1396,8 @@ static int svc_i3c_master_enable_ibi(struct i3c_dev_desc *dev)
 		return ret;
 	}
 
+	svc_i3c_master_enable_interrupts(master, SVC_I3C_MINT_SLVSTART);
+
 	return i3c_master_enec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
 }
 
@@ -1407,6 +1407,8 @@ static int svc_i3c_master_disable_ibi(struct i3c_dev_desc *dev)
 	struct svc_i3c_master *master = to_svc_i3c_master(m);
 	int ret;
 
+	svc_i3c_master_disable_interrupts(master);
+
 	ret = i3c_master_disec_locked(m, dev->info.dyn_addr, I3C_CCC_EVENT_SIR);
 
 	pm_runtime_mark_last_busy(master->dev);
-- 
2.25.1