This is a note to let you know that I've just added the patch titled
spi: spi-fsl-dspi: Drop extra spi_master_put in device remove function
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-spi-fsl-dspi-drop-extra-spi_master_put-in-device-remove-function.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6999aeabbb703a81a204cb6f9f8f151759a99ac4 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyj.lk@xxxxxxxxx>
Date: Sat, 20 Aug 2016 15:25:32 +0000
Subject: spi: spi-fsl-dspi: Drop extra spi_master_put in device remove function
From: Wei Yongjun <weiyj.lk@xxxxxxxxx>
commit 6999aeabbb703a81a204cb6f9f8f151759a99ac4 upstream.
The call sequence spi_alloc_master/spi_register_master/spi_unregister_master
is complete; it reduces the device reference count to zero, which and results
in device memory being freed. The subsequent call to spi_master_put is
unnecessary and results in an access to free memory. Drop it.
Fixes: 9298bc727385 ("spi: spi-fsl-dspi: Remove spi-bitbang")
Signed-off-by: Wei Yongjun <weiyj.lk@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-fsl-dspi.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -753,7 +753,6 @@ static int dspi_remove(struct platform_d
/* Disconnect from the SPI framework */
clk_disable_unprepare(dspi->clk);
spi_unregister_master(dspi->master);
- spi_master_put(dspi->master);
return 0;
}
Patches currently in stable-queue which might be from weiyj.lk@xxxxxxxxx are
queue-4.4/spi-spi-fsl-dspi-drop-extra-spi_master_put-in-device-remove-function.patch
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