[PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices.

From	Sandeep Jain <Sandeep_Jain@mentor.com>
Newsgroups	linux.kernel
Subject	[PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices.
Date	2016-08-04 16:20 +0200
Message-ID	<s2rF7-1SU-5@gated-at.bofh.it> (permalink)
References	<s2rvs-1NC-7@gated-at.bofh.it> <s2rvs-1NC-9@gated-at.bofh.it> <s2rvs-1NC-11@gated-at.bofh.it> <s2rF7-1SU-7@gated-at.bofh.it>
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From: Jim Baxter <jim_baxter@mentor.com>

Add hooks to mtdpart to call _get_device and _put_device,
this allows the mtd devices to perform internal
reference counting if required.

Signed-off-by: Jim Baxter <jim_baxter@mentor.com>
Signed-off-by: Sandeep Jain <Sandeep_Jain@mentor.com>
---
 drivers/mtd/mtdpart.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 1f13e32..adbb1fd 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -338,6 +338,20 @@ static const struct mtd_ooblayout_ops part_ooblayout_ops = {
 	.free = part_ooblayout_free,
 };
 
+static int part_get_device(struct mtd_info *mtd)
+{
+	struct mtd_part *part = mtd_to_part(mtd);
+
+	return part->master->_get_device(part->master);
+}
+
+static void part_put_device(struct mtd_info *mtd)
+{
+	struct mtd_part *part = mtd_to_part(mtd);
+
+	part->master->_put_device(part->master);
+}
+
 static inline void free_partition(struct mtd_part *p)
 {
 	kfree(p->mtd.name);
@@ -463,6 +477,10 @@ static struct mtd_part *allocate_partition(struct mtd_info *master,
 		slave->mtd._block_isbad = part_block_isbad;
 	if (master->_block_markbad)
 		slave->mtd._block_markbad = part_block_markbad;
+	if (master->_get_device)
+		slave->mtd._get_device = part_get_device;
+	if (master->_put_device)
+		slave->mtd._put_device = part_put_device;
 	slave->mtd._erase = part_erase;
 	slave->master = master;
 	slave->offset = part->offset;
-- 
1.7.9.5

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[PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices. Sandeep Jain <Sandeep_Jain@mentor.com> - 2016-08-04 16:20 +0200
  Re: [PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices. Richard Weinberger <richard.weinberger@gmail.com> - 2016-08-04 19:40 +0200
    Re: [PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices. "Baxter, Jim" <jim_baxter@mentor.com> - 2016-08-05 14:00 +0200
      Re: [PATCH v1 2/2] mtd: Add hooks to call get and put on mtd devices. Richard Weinberger <richard@nod.at> - 2016-08-05 14:20 +0200

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