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| author |   Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2023-01-13 20:14:04 +0300 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2023-02-10 17:15:23 -0600 |
| commit | 4ac1662105926c963d19e66caab16c77de01e681 (patch) | |
| tree | 154982da53d2126b1b5aa655dd422fe349181739 | |
| parent | dmaengine: dw-edma: Replace chip ID number with device name (diff) | |
| download | wireguard-linux-4ac1662105926c963d19e66caab16c77de01e681.tar.xz wireguard-linux-4ac1662105926c963d19e66caab16c77de01e681.zip | |
dmaengine: dw-edma: Skip cleanup procedure if no private data found
DW eDMA driver private data is preserved in the passed DW eDMA chip info
structure. If the probe fails or for some reason the passed info object
doesn't have the private data pointer initialized, halt the DMA device
cleanup procedure to prevent system crashes.
Link: https://lore.kernel.org/r/20230113171409.30470-23-Sergey.Semin@baikalelectronics.ru
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/dw-edma/dw-edma-core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index e3671bfbe186..1906a836f0aa 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -1011,6 +1011,10 @@ int dw_edma_remove(struct dw_edma_chip *chip) struct dw_edma *dw = chip->dw; int i; + /* Skip removal if no private data found */ + if (!dw) + return -ENODEV; + /* Disable eDMA */ dw_edma_v0_core_off(dw); |