diff options
| author | Thomas Tai <thomas.tai@oracle.com> | 2020-09-17 18:43:03 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-17 18:43:20 +0200 |
| commit | f959dcd6ddfd29235030e8026471ac1b022ad2b0 (patch) | |
| tree | b3bb71e9171c97f693240bdeb3e9ad2f0a5d580c /arch/arm/include/asm/dma-mapping.h | |
| parent | a92df4f62fda02e6b141e2b0bb52ccc486264b1c (diff) | |
dma-direct: Fix potential NULL pointer dereference
When booting the kernel v5.9-rc4 on a VM, the kernel would panic when
printing a warning message in swiotlb_map(). The dev->dma_mask must not
be a NULL pointer when calling the dma mapping layer. A NULL pointer
check can potentially avoid the panic.
Signed-off-by: Thomas Tai <thomas.tai@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/arm/include/asm/dma-mapping.h')
0 files changed, 0 insertions, 0 deletions