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From: Lukas Wunner <lukas@wunner.de>
To: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org,
	"Purna Chandra Mandal" <purna.mandal@microchip.com>
Subject: [PATCH] spi: pic32: Don't leak DMA channels in probe error path
Date: Sun, 8 Nov 2020 23:41:00 +0100	[thread overview]
Message-ID: <9624250e3a7aa61274b38219a62375bac1def637.1604874488.git.lukas@wunner.de> (raw)
In-Reply-To: <dd060534490eca5e946eb9165916542b01a9358d.1604874488.git.lukas@wunner.de>

If the calls to devm_request_irq() or devm_spi_register_master() fail
on probe of the PIC32 SPI driver, the DMA channels requested by
pic32_spi_dma_prep() are erroneously not released.  Plug the leak.

Fixes: 1bcb9f8ceb67 ("spi: spi-pic32: Add PIC32 SPI master driver")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v4.7+
Cc: Purna Chandra Mandal <purna.mandal@microchip.com>
---
 drivers/spi/spi-pic32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-pic32.c b/drivers/spi/spi-pic32.c
index 156961b4ca86..104bde153efd 100644
--- a/drivers/spi/spi-pic32.c
+++ b/drivers/spi/spi-pic32.c
@@ -839,6 +839,7 @@ static int pic32_spi_probe(struct platform_device *pdev)
 	return 0;
 
 err_bailout:
+	pic32_spi_dma_unprep(pic32s);
 	clk_disable_unprepare(pic32s->clk);
 err_master:
 	spi_master_put(master);
-- 
2.28.0


  parent reply	other threads:[~2020-11-08 22:49 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-08 22:41 [PATCH] spi: davinci: Fix use-after-free on unbind Lukas Wunner
2020-11-08 22:41 ` [PATCH] spi: st-ssc4: Fix unbalanced pm_runtime_disable() in probe error path Lukas Wunner
2020-11-12 19:39   ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: synquacer: Disable clock " Lukas Wunner
2020-11-09 14:22   ` Andy Shevchenko
2020-11-09 15:04     ` Lukas Wunner
2020-11-12 19:39   ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: lpspi: Fix use-after-free on unbind Lukas Wunner
2020-11-12 19:39   ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: atmel-quadspi: Disable clock in probe error path Lukas Wunner
2020-11-09 18:56   ` Tudor.Ambarus
2020-11-10 16:03   ` Mark Brown
2020-11-08 22:41 ` Lukas Wunner [this message]
2020-11-12 19:39   ` [PATCH] spi: pic32: Don't leak DMA channels " Mark Brown
2020-11-09  7:26 ` [PATCH] spi: davinci: Fix use-after-free on unbind Peter Ujfalusi

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