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authorGustavo Pimentel <Gustavo.Pimentel@synopsys.com>2021-02-18 20:04:06 +0100
committerVinod Koul <vkoul@kernel.org>2021-03-16 22:58:53 +0530
commite970dcc4bd8e0a1376e794fc81d41d0fc98262dd (patch)
treeecedeb62a7db0671cfc3a7704713c2dcf8714bc8 /drivers/dma/dw-edma
parent5244ac2e2e34d1f558ae690f10882ebe42365ea2 (diff)
dmaengine: dw-edma: Fix crash on loading/unloading driver
When the driver is compiled as a module and loaded if we try to unload it, the Kernel shows a crash log. This Kernel crash is due to the dma_async_device_unregister() call done after deleting the channels, this patch fixes this issue. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Link: https://lore.kernel.org/r/4aa850c035cf7ee488f1d3fb6dee0e37be0dce0a.1613674948.git.gustavo.pimentel@synopsys.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/dw-edma')
-rw-r--r--drivers/dma/dw-edma/dw-edma-core.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index bc94c8dfd9fd..a26d0d578a27 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -986,22 +986,21 @@ int dw_edma_remove(struct dw_edma_chip *chip)
/* Power management */
pm_runtime_disable(dev);
+ /* Deregister eDMA device */
+ dma_async_device_unregister(&dw->wr_edma);
list_for_each_entry_safe(chan, _chan, &dw->wr_edma.channels,
vc.chan.device_node) {
- list_del(&chan->vc.chan.device_node);
tasklet_kill(&chan->vc.task);
+ list_del(&chan->vc.chan.device_node);
}
+ dma_async_device_unregister(&dw->rd_edma);
list_for_each_entry_safe(chan, _chan, &dw->rd_edma.channels,
vc.chan.device_node) {
- list_del(&chan->vc.chan.device_node);
tasklet_kill(&chan->vc.task);
+ list_del(&chan->vc.chan.device_node);
}
- /* Deregister eDMA device */
- dma_async_device_unregister(&dw->wr_edma);
- dma_async_device_unregister(&dw->rd_edma);
-
/* Turn debugfs off */
dw_edma_v0_core_debugfs_off(chip);