linux-kernel - [PATCH 5.9 220/252] spi: npcm-fiu: Dont leak SPI master in probe error path

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Date:   Mon, 23 Nov 2020 13:22:50 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lukas Wunner <lukas@...ner.de>,
        Tomer Maimon <tmaimon77@...il.com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 5.9 220/252] spi: npcm-fiu: Dont leak SPI master in probe error path

From: Lukas Wunner <lukas@...ner.de>

commit 04a9cd51d3f3308a98cbc6adc07acb12fbade011 upstream.

If the calls to of_match_device(), of_alias_get_id(),
devm_ioremap_resource(), devm_regmap_init_mmio() or devm_clk_get()
fail on probe of the NPCM FIU SPI driver, the spi_controller struct is
erroneously not freed.

Fix by switching over to the new devm_spi_alloc_master() helper.

Fixes: ace55c411b11 ("spi: npcm-fiu: add NPCM FIU controller driver")
Signed-off-by: Lukas Wunner <lukas@...ner.de>
Cc: <stable@...r.kernel.org> # v5.4+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation
Cc: <stable@...r.kernel.org> # v5.4+
Cc: Tomer Maimon <tmaimon77@...il.com>
Link: https://lore.kernel.org/r/a420c23a363a3bc9aa684c6e790c32a8af106d17.1605512876.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/spi/spi-npcm-fiu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/spi/spi-npcm-fiu.c
+++ b/drivers/spi/spi-npcm-fiu.c
@@ -680,7 +680,7 @@ static int npcm_fiu_probe(struct platfor
 	int ret;
 	int id;
 
-	ctrl = spi_alloc_master(dev, sizeof(*fiu));
+	ctrl = devm_spi_alloc_master(dev, sizeof(*fiu));
 	if (!ctrl)
 		return -ENOMEM;