From: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
To: <linux-arm-kernel@lists.infradead.org>, <soc@kernel.org>
Cc: olof@lixom.net, catalin.marinas@arm.com, will@kernel.org,
misono.tomohiro@jp.fujitsu.com, arnd@arndb.de
Subject: [PATCH 08/10] soc: fujitsu: hwb: Add release operation
Date: Fri, 8 Jan 2021 19:52:39 +0900 [thread overview]
Message-ID: <20210108105241.1757799-9-misono.tomohiro@jp.fujitsu.com> (raw)
In-Reply-To: <20210108105241.1757799-1-misono.tomohiro@jp.fujitsu.com>
Upon release, we cleanup remaining resources/registers if necessary.
This happens when user does not call IOC_BB_FREE properly and the
function will do effectively the same operation as IOC_BB_FREE.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
---
drivers/soc/fujitsu/fujitsu_hwb.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/soc/fujitsu/fujitsu_hwb.c b/drivers/soc/fujitsu/fujitsu_hwb.c
index 1132cb74b13b..46f1f244f93a 100644
--- a/drivers/soc/fujitsu/fujitsu_hwb.c
+++ b/drivers/soc/fujitsu/fujitsu_hwb.c
@@ -796,9 +796,35 @@ static int fujitsu_hwb_dev_open(struct inode *inode, struct file *filp)
return 0;
}
+static int fujitsu_hwb_dev_release(struct inode *inode, struct file *filp)
+{
+ struct hwb_private_data *pdata = (struct hwb_private_data *)filp->private_data;
+ struct bb_info *bb_info, *tmp;
+
+ /*
+ * Cleanup BB if IOC_BB_FREE is not called properly.
+ * No lock for pdata->bb_list is needed cause there is no one else
+ */
+ if (!list_empty(&pdata->bb_list)) {
+ pr_warn("free operation is not called properly\n");
+
+ list_for_each_entry_safe(bb_info, tmp, &pdata->bb_list, node) {
+ teardown_bb(bb_info);
+ list_del_init(&bb_info->node);
+ /* 1 put for alloc_bb_info */
+ put_bb_info(bb_info);
+ }
+ }
+
+ kfree(pdata);
+
+ return 0;
+}
+
static const struct file_operations fujitsu_hwb_dev_fops = {
.owner = THIS_MODULE,
.open = fujitsu_hwb_dev_open,
+ .release = fujitsu_hwb_dev_release,
.unlocked_ioctl = fujitsu_hwb_dev_ioctl,
};
--
2.26.2
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next prev parent reply other threads:[~2021-01-08 10:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 10:52 [RFC PATCH 00/10] Add Fujitsu A64FX soc entry/hardware barrier driver Misono Tomohiro
2021-01-08 10:52 ` [PATCH 01/10] soc: fujitsu: hwb: Add hardware barrier driver init/exit code Misono Tomohiro
2021-01-08 10:52 ` [PATCH 02/10] soc: fujtisu: hwb: Add open operation Misono Tomohiro
2021-01-08 10:52 ` [PATCH 03/10] soc: fujitsu: hwb: Add IOC_BB_ALLOC ioctl Misono Tomohiro
2021-01-08 13:22 ` Arnd Bergmann
2021-01-12 11:02 ` misono.tomohiro
2021-01-12 12:34 ` Arnd Bergmann
2021-01-08 10:52 ` [PATCH 04/10] soc: fujitsu: hwb: Add IOC_BW_ASSIGN ioctl Misono Tomohiro
2021-01-08 10:52 ` [PATCH 05/10] soc: fujitsu: hwb: Add IOC_BW_UNASSIGN ioctl Misono Tomohiro
2021-01-08 10:52 ` [PATCH 06/10] soc: fujitsu: hwb: Add IOC_BB_FREE ioctl Misono Tomohiro
2021-01-08 10:52 ` [PATCH 07/10] soc: fujitsu: hwb: Add IOC_GET_PE_INFO ioctl Misono Tomohiro
2021-01-08 10:52 ` Misono Tomohiro [this message]
2021-01-08 13:25 ` [PATCH 08/10] soc: fujitsu: hwb: Add release operation Arnd Bergmann
2021-01-12 10:38 ` misono.tomohiro
2021-01-08 10:52 ` [PATCH 09/10] soc: fujitsu: hwb: Add sysfs entry Misono Tomohiro
2021-01-08 13:27 ` Arnd Bergmann
2021-01-12 10:40 ` misono.tomohiro
2021-01-08 10:52 ` [PATCH 10/10] soc: fujitsu: hwb: Add Kconfig/Makefile to build fujitsu_hwb driver Misono Tomohiro
2021-01-08 12:54 ` [RFC PATCH 00/10] Add Fujitsu A64FX soc entry/hardware barrier driver Mark Rutland
2021-01-08 14:23 ` Arnd Bergmann
2021-01-08 15:51 ` Mark Rutland
2021-01-12 10:24 ` misono.tomohiro
2021-01-12 14:22 ` Arnd Bergmann
2021-01-15 11:10 ` misono.tomohiro
2021-01-15 12:24 ` Arnd Bergmann
2021-01-19 5:30 ` misono.tomohiro
2021-02-18 9:49 ` misono.tomohiro
2021-03-01 7:53 ` misono.tomohiro
2021-03-02 11:06 ` Arnd Bergmann
2021-03-03 11:20 ` misono.tomohiro
2021-03-03 13:33 ` Arnd Bergmann
2021-03-04 7:03 ` misono.tomohiro
2021-01-12 10:32 ` misono.tomohiro
-- strict thread matches above, loose matches on Subject: below --
2021-01-08 10:32 Misono Tomohiro
2021-01-08 10:32 ` [PATCH 08/10] soc: fujitsu: hwb: Add release operation Misono Tomohiro
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