[PATCH v2 19/20] staging: fbtft: Make fbtft_remove_common() return void - Uwe Kleine-König

From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Len Baker <len.baker@gmx.com>, Mark Brown <broonie@kernel.org>,
	Phil Reid <preid@electromag.com.au>,
	dri-devel@lists.freedesktop.org, kernel@pengutronix.de,
	linux-fbdev@vger.kernel.org, linux-spi@vger.kernel.org,
	linux-staging@lists.linux.dev
Subject: [PATCH v2 19/20] staging: fbtft: Make fbtft_remove_common() return void
Date: Tue, 12 Oct 2021 17:39:44 +0200	[thread overview]
Message-ID: <20211012153945.2651412-20-u.kleine-koenig@pengutronix.de> (raw)
In-Reply-To: <20211012153945.2651412-1-u.kleine-koenig@pengutronix.de>

fbtft_remove_common() is only called with a non-NULL fb_info. (All
callers are in remove callbacks and the matching probe callbacks set
driver data accordingly.) So fbtft_remove_common() always returns zero.
Make it return void instead which makes it easier to see in the callers
that there is no error to handle.

Also the return value of platform and spi remove callbacks is ignored
anyway and not freeing resources in .remove() is a bad idea.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/staging/fbtft/fbtft-core.c | 8 +-------
 drivers/staging/fbtft/fbtft.h      | 8 +++++---
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index ed992ca605eb..9c9eab1182a6 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -1318,23 +1318,17 @@ EXPORT_SYMBOL(fbtft_probe_common);
  * @info: Framebuffer
  *
  * Unregisters and releases the framebuffer
- *
- * Return: 0 if successful, negative if error
  */
-int fbtft_remove_common(struct device *dev, struct fb_info *info)
+void fbtft_remove_common(struct device *dev, struct fb_info *info)
 {
 	struct fbtft_par *par;
 
-	if (!info)
-		return -EINVAL;
 	par = info->par;
 	if (par)
 		fbtft_par_dbg(DEBUG_DRIVER_INIT_FUNCTIONS, par,
 			      "%s()\n", __func__);
 	fbtft_unregister_framebuffer(info);
 	fbtft_framebuffer_release(info);
-
-	return 0;
 }
 EXPORT_SYMBOL(fbtft_remove_common);
 
diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
index 76f8c090a837..6869f3603b0e 100644
--- a/drivers/staging/fbtft/fbtft.h
+++ b/drivers/staging/fbtft/fbtft.h
@@ -252,7 +252,7 @@ void fbtft_unregister_backlight(struct fbtft_par *par);
 int fbtft_init_display(struct fbtft_par *par);
 int fbtft_probe_common(struct fbtft_display *display, struct spi_device *sdev,
 		       struct platform_device *pdev);
-int fbtft_remove_common(struct device *dev, struct fb_info *info);
+void fbtft_remove_common(struct device *dev, struct fb_info *info);
 
 /* fbtft-io.c */
 int fbtft_write_spi(struct fbtft_par *par, void *buf, size_t len);
@@ -283,7 +283,8 @@ static int fbtft_driver_remove_spi(struct spi_device *spi)                 \
 {                                                                          \
 	struct fb_info *info = spi_get_drvdata(spi);                       \
 									   \
-	return fbtft_remove_common(&spi->dev, info);                       \
+	fbtft_remove_common(&spi->dev, info);                              \
+	return 0;                                                          \
 }                                                                          \
 									   \
 static int fbtft_driver_probe_pdev(struct platform_device *pdev)           \
@@ -295,7 +296,8 @@ static int fbtft_driver_remove_pdev(struct platform_device *pdev)          \
 {                                                                          \
 	struct fb_info *info = platform_get_drvdata(pdev);                 \
 									   \
-	return fbtft_remove_common(&pdev->dev, info);                      \
+	fbtft_remove_common(&pdev->dev, info);                             \
+	return 0;                                                          \
 }                                                                          \
 									   \
 static const struct of_device_id dt_ids[] = {                              \
-- 
2.30.2

