Re: [PATCH v2 3/5] tty: serial: amba-pl011: cleanup driver

[Ilpo Järvinen]

On Thu, 16 Nov 2023, Théo Lebrun wrote:

> Follow recommandations from:
> 
>     $ ./scripts/checkpatch.pl --strict --file \
>             drivers/tty/serial/amba-pl011.c
> 
> It does NOT fix alerts relative to TIOCMBIT which will be dealt with in
> another patch. Fixes following alerts:
> 
>     CHECK: Alignment should match open parenthesis
>     CHECK: Blank lines aren't necessary after an open brace '{'
>     CHECK: Comparison to NULL could be written [...]
>     CHECK: Lines should not end with a '('
>     CHECK: Please don't use multiple blank lines
>     CHECK: Please use a blank line after function/struct/union/enum declarations
>     CHECK: Prefer using the BIT macro
>     CHECK: Unbalanced braces around else statement
>     CHECK: Unnecessary parentheses around [...]
>     CHECK: braces {} should be used on all arms of this statement
>     CHECK: spaces preferred around that '/' (ctx:VxV)
>     CHECK: spaces preferred around that '|' (ctx:VxV)
>     ERROR: do not initialise statics to false
>     WARNING: Comparisons should place the constant on the right side of the test
>     WARNING: Possible unnecessary 'out of memory' message
>     WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
>     WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
>     WARNING: quoted string split across lines
> 
> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Signed-off-by: Théo Lebrun <theo.lebrun@xxxxxxxxxxx>
> ---

> @@ -2916,9 +2911,12 @@ static int sbsa_uart_probe(struct platform_device *pdev)
>  	if (qdf2400_e44_present) {
>  		dev_info(&pdev->dev, "working around QDF2400 SoC erratum 44\n");
>  		uap->vendor = &vendor_qdt_qdf2400_e44;
> -	} else
> -#endif
> +	} else {
>  		uap->vendor = &vendor_sbsa;
> +	}
> +#else
> +	uap->vendor = &vendor_sbsa;
> +#endif

IMO, this would look a lot nicer if you make a function out of it (but 
perhaps it can be changed in a follow-up patch):

#ifdef CONFIG_ACPI_SPCR_TABLE
static void qpdf2400_erratum44_workaround(struct platform_device *pdev,
					  struct uart_amba_port *uap)
{
	if (!qdf2400_e44_present)
		return;

	dev_info(&pdev->dev, "working around QDF2400 SoC erratum 44\n");
	uap->vendor = &vendor_qdt_qdf2400_e44;
}
#else
static void qpdf2400_erratum44_workaround(struct platform_device *pdev,
					  struct uart_amba_port *uap) { }	
#endif


static int sbsa_uart_probe(struct platform_device *pdev)
{
	...
	uap->vendor = &vendor_sbsa;
	qpdf2400_erratum44_workaround(pdev, uap);
	...
}


Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>


-- 
 i.