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From:   Michael Walle <michael@walle.cc>
To:     Jonathan Corbet <corbet@lwn.net>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>
Cc:     linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        Michael Walle <michael@walle.cc>
Subject: [PATCH v3 06/18] nvmem: core: drop the removal of the cells in nvmem_add_cells()
Date:   Fri, 18 Nov 2022 19:51:06 +0100
Message-Id: <20221118185118.1190044-7-michael@walle.cc>
In-Reply-To: <20221118185118.1190044-1-michael@walle.cc>
References: <20221118185118.1190044-1-michael@walle.cc>
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If nvmem_add_cells() fails, the whole nvmem_register() will fail
and the cells will then be removed anyway. This is a prepartion
to introduce a nvmem_add_one_cell() which can then be used by
nvmem_add_cells().

This is then the same to what nvmem_add_cells_from_table() and
nvmem_add_cells_from_of() do.

Signed-off-by: Michael Walle <michael@walle.cc>
---
changes since v2:
 - none

changes since v1:
 - none

 drivers/nvmem/core.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 24573e63e5a9..7c76e0e0072e 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -515,7 +515,7 @@ static int nvmem_add_cells(struct nvmem_device *nvmem,
 		    int ncells)
 {
 	struct nvmem_cell_entry **cells;
-	int i, rval;
+	int i, rval = 0;
 
 	cells = kcalloc(ncells, sizeof(*cells), GFP_KERNEL);
 	if (!cells)
@@ -525,28 +525,22 @@ static int nvmem_add_cells(struct nvmem_device *nvmem,
 		cells[i] = kzalloc(sizeof(**cells), GFP_KERNEL);
 		if (!cells[i]) {
 			rval = -ENOMEM;
-			goto err;
+			goto out;
 		}
 
 		rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, &info[i], cells[i]);
 		if (rval) {
 			kfree(cells[i]);
-			goto err;
+			goto out;
 		}
 
 		nvmem_cell_entry_add(cells[i]);
 	}
 
+out:
 	/* remove tmp array */
 	kfree(cells);
 
-	return 0;
-err:
-	while (i--)
-		nvmem_cell_entry_drop(cells[i]);
-
-	kfree(cells);
-
 	return rval;
 }
 
-- 
2.30.2