diff options
| author | Jarkko Nikula <jarkko.nikula@linux.intel.com> | 2023-09-21 08:57:01 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2023-09-25 23:35:14 +0200 |
| commit | b8806e0c939f168237593af0056c309bf31022b0 (patch) | |
| tree | b04e514a065b0142f5b6cdcdbe34bfa9a55a9c63 /drivers/i3c | |
| parent | 7ccd40edc1f5c43e3f1c7d209336d3981943ab63 (diff) | |
| download | linux-b8806e0c939f168237593af0056c309bf31022b0.tar.gz | |
i3c: mipi-i3c-hci: Do not unmap region not mapped for transfer
Fix following warning (with CONFIG_DMA_API_DEBUG) which happens with a
transfer without a data buffer.
DMA-API: i3c mipi-i3c-hci.0: device driver tries to free DMA memory it has not allocated [device address=0x0000000000000000] [size=0 bytes]
For those transfers the hci_dma_queue_xfer() doesn't create a mapping and
the DMA address pointer xfer->data_dma is not set.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20230921055704.1087277-10-jarkko.nikula@linux.intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master/mipi-i3c-hci/dma.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c index cb41d0026abd2..c8720e6334c9e 100644 --- a/drivers/i3c/master/mipi-i3c-hci/dma.c +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c @@ -347,6 +347,8 @@ static void hci_dma_unmap_xfer(struct i3c_hci *hci, for (i = 0; i < n; i++) { xfer = xfer_list + i; + if (!xfer->data) + continue; dma_unmap_single(&hci->master.dev, xfer->data_dma, xfer->data_len, xfer->rnw ? DMA_FROM_DEVICE : DMA_TO_DEVICE); |