| Message ID | 87d2buk6j7.wl%kuninori.morimoto.gx@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Wed, Aug 20, 2014 at 05:53:03PM -0700, Kuninori Morimoto wrote: > From: Ryo Kataoka <ryo.kataoka.wt@renesas.com> > > In case of no corresponding slave ID, the audmapp_set_slave() returns > -ENXIO same as sh_dmae_set_slave() of shdmac.c. > DMAEngine might return wrong channel without this patch Hi Morimoto-san, could you please make a note of which commit introduced this problem and if is known to manifest at this time? > Signed-off-by: Ryo Kataoka <ryo.kataoka.wt@renesas.com> > Signed-off-by: Jun Watanabe <jun.watanabe.ue@renesas.com>, > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > --- > drivers/dma/sh/rcar-audmapp.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c > index dabbf0a..80fd2ae 100644 > --- a/drivers/dma/sh/rcar-audmapp.c > +++ b/drivers/dma/sh/rcar-audmapp.c > @@ -117,7 +117,7 @@ static void audmapp_start_xfer(struct shdma_chan *schan, > audmapp_write(auchan, chcr, PDMACHCR); > } > > -static void audmapp_get_config(struct audmapp_chan *auchan, int slave_id, > +static int audmapp_get_config(struct audmapp_chan *auchan, int slave_id, > u32 *chcr, dma_addr_t *dst) > { > struct audmapp_device *audev = to_dev(auchan); > @@ -131,20 +131,22 @@ static void audmapp_get_config(struct audmapp_chan *auchan, int slave_id, > if (!pdata) { /* DT */ > *chcr = ((u32)slave_id) << 16; > auchan->shdma_chan.slave_id = (slave_id) >> 8; > - return; > + return 0; > } > > /* non-DT */ > > if (slave_id >= AUDMAPP_SLAVE_NUMBER) > - return; > + return -ENXIO; > > for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++) > if (cfg->slave_id == slave_id) { > *chcr = cfg->chcr; > *dst = cfg->dst; > - break; > + return 0; > } > + > + return -ENXIO; > } > > static int audmapp_set_slave(struct shdma_chan *schan, int slave_id, > @@ -153,8 +155,11 @@ static int audmapp_set_slave(struct shdma_chan *schan, int slave_id, > struct audmapp_chan *auchan = to_chan(schan); > u32 chcr; > dma_addr_t dst; > + int ret; > > - audmapp_get_config(auchan, slave_id, &chcr, &dst); > + ret = audmapp_get_config(auchan, slave_id, &chcr, &dst); > + if (ret < 0) > + return ret; > > if (try) > return 0; > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Simon > > From: Ryo Kataoka <ryo.kataoka.wt@renesas.com> > > > > In case of no corresponding slave ID, the audmapp_set_slave() returns > > -ENXIO same as sh_dmae_set_slave() of shdmac.c. > > DMAEngine might return wrong channel without this patch > > Hi Morimoto-san, > > could you please make a note of which commit introduced this problem > and if is known to manifest at this time? This issue happens under non-DT style, and, upstream code doesn't have it. So, this patch solved hidden bug for upstream. Best regards --- Kuninori Morimoto -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c index dabbf0a..80fd2ae 100644 --- a/drivers/dma/sh/rcar-audmapp.c +++ b/drivers/dma/sh/rcar-audmapp.c @@ -117,7 +117,7 @@ static void audmapp_start_xfer(struct shdma_chan *schan, audmapp_write(auchan, chcr, PDMACHCR); } -static void audmapp_get_config(struct audmapp_chan *auchan, int slave_id, +static int audmapp_get_config(struct audmapp_chan *auchan, int slave_id, u32 *chcr, dma_addr_t *dst) { struct audmapp_device *audev = to_dev(auchan); @@ -131,20 +131,22 @@ static void audmapp_get_config(struct audmapp_chan *auchan, int slave_id, if (!pdata) { /* DT */ *chcr = ((u32)slave_id) << 16; auchan->shdma_chan.slave_id = (slave_id) >> 8; - return; + return 0; } /* non-DT */ if (slave_id >= AUDMAPP_SLAVE_NUMBER) - return; + return -ENXIO; for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++) if (cfg->slave_id == slave_id) { *chcr = cfg->chcr; *dst = cfg->dst; - break; + return 0; } + + return -ENXIO; } static int audmapp_set_slave(struct shdma_chan *schan, int slave_id, @@ -153,8 +155,11 @@ static int audmapp_set_slave(struct shdma_chan *schan, int slave_id, struct audmapp_chan *auchan = to_chan(schan); u32 chcr; dma_addr_t dst; + int ret; - audmapp_get_config(auchan, slave_id, &chcr, &dst); + ret = audmapp_get_config(auchan, slave_id, &chcr, &dst); + if (ret < 0) + return ret; if (try) return 0;