linux-kernel - [PATCH 2/3] firmware: imx: Save channel name for further use

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Message-Id: <20200708073556.19188-3-daniel.baluta@oss.nxp.com>
Date:   Wed,  8 Jul 2020 10:35:55 +0300
From:   Daniel Baluta <daniel.baluta@....nxp.com>
To:     shawnguo@...nel.org, kernel@...gutronix.de
Cc:     s.hauer@...gutronix.de, festevam@...il.com, linux-imx@....com,
        linux@...pel-privat.de, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] firmware: imx: Save channel name for further use

From: Daniel Baluta <daniel.baluta@....com>

We want to request / free channels on demand later in order
to save power.

For this for each channel we save the name and use it to
reference the channel later.

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 drivers/firmware/imx/imx-dsp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/imx/imx-dsp.c b/drivers/firmware/imx/imx-dsp.c
index a3a018c87b52..b6e95d6d34c0 100644
--- a/drivers/firmware/imx/imx-dsp.c
+++ b/drivers/firmware/imx/imx-dsp.c
@@ -79,6 +79,7 @@ static int imx_dsp_setup_channels(struct imx_dsp_ipc *dsp_ipc)
 			return -ENOMEM;
 
 		dsp_chan = &dsp_ipc->chans[i];
+		dsp_chan->name = chan_name;
 		cl = &dsp_chan->cl;
 		cl->dev = dev;
 		cl->tx_block = false;
@@ -97,16 +98,14 @@ static int imx_dsp_setup_channels(struct imx_dsp_ipc *dsp_ipc)
 		}
 
 		dev_dbg(dev, "request mbox chan %s\n", chan_name);
-		/* chan_name is not used anymore by framework */
-		kfree(chan_name);
 	}
 
 	return 0;
 out:
-	kfree(chan_name);
 	for (j = 0; j < i; j++) {
 		dsp_chan = &dsp_ipc->chans[j];
 		mbox_free_channel(dsp_chan->ch);
+		kfree(dsp_chan->name);
 	}
 
 	return ret;
@@ -147,6 +146,7 @@ static int imx_dsp_remove(struct platform_device *pdev)
 	for (i = 0; i < DSP_MU_CHAN_NUM; i++) {
 		dsp_chan = &dsp_ipc->chans[i];
 		mbox_free_channel(dsp_chan->ch);
+		kfree(dsp_chan->name);
 	}
 
 	return 0;
-- 
2.17.1