This is a note to let you know that I've just added the patch titled
spi: dw-mid: check that DMA was inited before exit
to the 3.17-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-dw-mid-check-that-dma-was-inited-before-exit.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fb57862ead652454ceeb659617404c5f13bc34b5 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Fri, 12 Sep 2014 15:11:58 +0300
Subject: spi: dw-mid: check that DMA was inited before exit
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
commit fb57862ead652454ceeb659617404c5f13bc34b5 upstream.
If the driver was compiled with DMA support, but DMA channels weren't acquired
by some reason, mid_spi_dma_exit() will crash the kernel.
Fixes: 7063c0d942a1 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-dw-mid.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -89,6 +89,8 @@ err_exit:
static void mid_spi_dma_exit(struct dw_spi *dws)
{
+ if (!dws->dma_inited)
+ return;
dma_release_channel(dws->txchan);
dma_release_channel(dws->rxchan);
}
Patches currently in stable-queue which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are
queue-3.17/pci_ids-add-support-for-intel-quark-ilb.patch
queue-3.17/spi-dw-mid-check-that-dma-was-inited-before-exit.patch
queue-3.17/spi-dw-mid-respect-8-bit-mode.patch
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