Hi Dan,

On Mon, Feb 08, 2021 at 04:45:17PM +0300, Dan Carpenter wrote:

On Sun, Feb 07, 2021 at 05:23:28PM +0800, Youling Tang wrote:

quoted

Fix the below ignoring return value warning for device_reset.

drivers/staging/mt7621-dma/mtk-hsdma.c:685:2: warning: ignoring return value
of function declared with 'warn_unused_result' attribute [-Wunused-result]
        device_reset(&pdev->dev);
        ^~~~~~~~~~~~ ~~~~~~~~~~
drivers/staging/ralink-gdma/ralink-gdma.c:836:2: warning: ignoring return value
of function declared with 'warn_unused_result' attribute [-Wunused-result]
        device_reset(&pdev->dev);
        ^~~~~~~~~~~~ ~~~~~~~~~~

We can't really do this sort of fix without the hardware to test it.
This could be the correct fix or perhaps switching to device_reset_optional()
is the correct fix.  We can't know unless we have the hardware to test.

When device_reset() is the wrong function then adding a return value
check will turn this into a runtime error for those who have the
hardware which will hopefully trigger them to tell us why reset_device
is wrong for them.
At least for a staging driver I find this procedure opportune.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel