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| author | Richard Genoud <richard.genoud@gmail.com> | 2018-11-27 17:06:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 19:32:12 +0100 |
| commit | 0d04d450fe0d34bd0173a36d8748226925ba1ade (patch) | |
| tree | 38a2e04c4c2b53265c4d934047a0768240000224 /drivers/dma | |
| parent | 9983a5bba09e5b56b73881ce99b95b0723f72bc3 (diff) | |
| download | linux-stable-0d04d450fe0d34bd0173a36d8748226925ba1ade.tar.gz linux-stable-0d04d450fe0d34bd0173a36d8748226925ba1ade.tar.bz2 linux-stable-0d04d450fe0d34bd0173a36d8748226925ba1ade.zip | |
dmaengine: at_hdmac: fix module unloading
commit 77e75fda94d2ebb86aa9d35fb1860f6395bf95de upstream.
of_dma_controller_free() was not called on module onloading.
This lead to a soft lockup:
watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
Modules linked in: at_hdmac [last unloaded: at_hdmac]
when of_dma_request_slave_channel() tried to call ofdma->of_dma_xlate().
Cc: stable@vger.kernel.org
Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding")
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index ba8994e10ed9..dbc51154f122 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -2006,6 +2006,8 @@ static int at_dma_remove(struct platform_device *pdev) struct resource *io; at_dma_off(atdma); + if (pdev->dev.of_node) + of_dma_controller_free(pdev->dev.of_node); dma_async_device_unregister(&atdma->dma_common); dma_pool_destroy(atdma->memset_pool); |