diff options
| -rw-r--r-- | drivers/dma/sh/rz-dmac.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index e2d506eb8194..29fa2ad07e30 100644 --- a/drivers/dma/sh/rz-dmac.c +++ b/drivers/dma/sh/rz-dmac.c @@ -696,7 +696,7 @@ static void rz_dmac_irq_handle_channel(struct rz_dmac_chan *channel) { struct dma_chan *chan = &channel->vc.chan; struct rz_dmac *dmac = to_rz_dmac(chan->device); - u32 chstat, chctrl; + u32 chstat; chstat = rz_dmac_ch_readl(channel, CHSTAT, 1); if (chstat & CHSTAT_ER) { @@ -708,8 +708,11 @@ static void rz_dmac_irq_handle_channel(struct rz_dmac_chan *channel) goto done; } - chctrl = rz_dmac_ch_readl(channel, CHCTRL, 1); - rz_dmac_ch_writel(channel, chctrl | CHCTRL_CLREND, CHCTRL, 1); + /* + * No need to lock. This just clears the END interrupt. Writing + * zeros to CHCTRL is just ignored by HW. + */ + rz_dmac_ch_writel(channel, CHCTRL_CLREND, CHCTRL, 1); done: return; } |