linux-kernel - [PATCH] pmdomain: imx8mp-blk-ctrl: Add a missing judgment

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Message-Id: <20250113045609.842243-1-xiaolei.wang@windriver.com>
Date: Mon, 13 Jan 2025 12:56:09 +0800
From: Xiaolei Wang <xiaolei.wang@...driver.com>
To: l.stach@...gutronix.de, ulf.hansson@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        ping.bai@....com, aford173@...il.com, peng.fan@....com, marex@...x.de,
        xiaolei.wang@...driver.com
Cc: linux-pm@...r.kernel.org, imx@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pmdomain: imx8mp-blk-ctrl: Add a missing judgment

Currently imx8mp_blk_ctrl_remove() will continue the for loop
until an out-of-bounds exception occurs.

pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dev_pm_domain_detach+0x8/0x48
lr : imx8mp_blk_ctrl_shutdown+0x58/0x90
sp : ffffffc084f8bbf0
x29: ffffffc084f8bbf0 x28: ffffff80daf32ac0 x27: 0000000000000000
x26: ffffffc081658d78 x25: 0000000000000001 x24: ffffffc08201b028
x23: ffffff80d0db9490 x22: ffffffc082340a78 x21: 00000000000005b0
x20: ffffff80d19bc180 x19: 000000000000000a x18: ffffffffffffffff
x17: ffffffc080a39e08 x16: ffffffc080a39c98 x15: 4f435f464f006c72
x14: 0000000000000004 x13: ffffff80d0172110 x12: 0000000000000000
x11: ffffff80d0537740 x10: ffffff80d05376c0 x9 : ffffffc0808ed2d8
x8 : ffffffc084f8bab0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffffff80d19b9420 x4 : fffffffe03466e60 x3 : 0000000080800077
x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 dev_pm_domain_detach+0x8/0x48
 platform_shutdown+0x2c/0x48
 device_shutdown+0x158/0x268
 kernel_restart_prepare+0x40/0x58
 kernel_kexec+0x58/0xe8
 __do_sys_reboot+0x198/0x258
 __arm64_sys_reboot+0x2c/0x40
 invoke_syscall+0x5c/0x138
 el0_svc_common.constprop.0+0x48/0xf0
 do_el0_svc+0x24/0x38
 el0_svc+0x38/0xc8
 el0t_64_sync_handler+0x120/0x130
 el0t_64_sync+0x190/0x198
Code: 8128c2d0 ffffffc0 aa1e03e9 d503201f

Fixes: 556f5cf9568a ("soc: imx: add i.MX8MP HSIO blk-ctrl")
Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>
---
 drivers/pmdomain/imx/imx8mp-blk-ctrl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
index e3a0f64c144c..3668fe66b22c 100644
--- a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
+++ b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
@@ -770,7 +770,7 @@ static void imx8mp_blk_ctrl_remove(struct platform_device *pdev)
 
 	of_genpd_del_provider(pdev->dev.of_node);
 
-	for (i = 0; bc->onecell_data.num_domains; i++) {
+	for (i = 0; i < bc->onecell_data.num_domains; i++) {
 		struct imx8mp_blk_ctrl_domain *domain = &bc->domains[i];
 
 		pm_genpd_remove(&domain->genpd);
-- 
2.25.1