RE: [PATCH v2 3/3] dma: Add Freescale eDMA engine driver support

[Lu Jingchang-B35083]

> -----Original Message-----
> From: Vinod Koul [mailto:vinod.koul@xxxxxxxxx]
> Sent: Tuesday, August 06, 2013 12:35 AM
> To: Lu Jingchang-B35083
> Cc: djbw@xxxxxx; shawn.guo@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; Wang Huan-B18965; Li Xiaochun-
> B41219
> Subject: Re: [PATCH v2 3/3] dma: Add Freescale eDMA engine driver support
> > +
> > +static void fsl_edma_free_desc(struct virt_dma_desc *vdesc) {
> > +	struct fsl_edma_desc *fsl_desc;
> > +	int i;
> > +
> > +	fsl_desc = to_fsl_edma_desc(vdesc);
> > +	for (i = 0; i < fsl_desc->n_tcds; i++)
> > +			dma_pool_free(fsl_desc->echan->tcd_pool,
> > +					fsl_desc->tcd[i].vtcd,
> > +					fsl_desc->tcd[i].ptcd);
> > +	kfree(fsl_desc);
> should this be called with lock held or not?
[Lu Jingchang-B35083] 
The desc list to be freed is got with lock held, and the free for each desc is independent, and the lock is not needed. Thanks.






Best Regards,
Jingchang


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