Hello Jingchang Lu,
This is a semi-automatic email about new static checker warnings.
The patch d6be34fbd39b: "dma: Add Freescale eDMA engine driver
support" from Feb 18, 2014, leads to the following Smatch complaint:
drivers/dma/fsl-edma.c:420 fsl_edma_tx_status()
error: we previously assumed 'fsl_chan->edesc' could be null (see line 417)
drivers/dma/fsl-edma.c
416 vdesc = vchan_find_desc(&fsl_chan->vchan, cookie);
417 if (fsl_chan->edesc && cookie == fsl_chan->edesc->vdesc.tx.cookie)
^^^^^^^^^^^^^^^
Checked for NULL.
418 txstate->residue = fsl_edma_desc_residue(fsl_chan, vdesc, true);
419 else if (vdesc)
420 txstate->residue = fsl_edma_desc_residue(fsl_chan, vdesc, false);
^^^^^^^^
Unchecked dereference inside the function.
421 else
422 txstate->residue = 0;
regards,
dan carpenter
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