[U-Boot] [PATCH] socfpga: cleanup socfpga_dw_mmc

[Chin Liang See]

Hi Pavel,


On Mon, 2014-07-21 at 12:30 +0200, ZY - pavel wrote:
> Cleanups as suggested by wd on mailing list, plus I replaced
> calloc(...,1) with malloc().
>     
> Signed-off-by: Pavel Machek <pavel at denx.de>
> 
> --- a/drivers/mmc/socfpga_dw_mmc.c
> +++ b/drivers/mmc/socfpga_dw_mmc.c
> @@ -16,8 +16,6 @@ static const struct socfpga_clock_manager *clock_manager_base =
>  static const struct socfpga_system_manager *system_manager_base =
>  		(void *)SOCFPGA_SYSMGR_ADDRESS;
>  
> -static char *SOCFPGA_NAME = "SOCFPGA DWMMC";
> -
>  #define CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK (1 << 8)
>  
>  static void socfpga_dwmci_clksel(struct dwmci_host *host)
> @@ -47,14 +45,15 @@ static void socfpga_dwmci_clksel(struct dwmci_host *host)
>  
>  int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
>  {
> -	struct dwmci_host *host = NULL;
> -	host = calloc(sizeof(struct dwmci_host), 1);
> +	struct dwmci_host *host;
> +
> +	host = malloc(sizeof(struct dwmci_host));

We need calloc as it will initialize the allocated region. It will
prevent errors due to NULL comparison against uninitialized structure
member.

Thanks
Chin Liang

>  	if (!host) {
>  		printf("dwmci_host calloc fail!\n");
>  		return -1;
>  	}
>  
> -	host->name = SOCFPGA_NAME;
> +	host->name = "SOCFPGA DWMMC";
>  	host->ioaddr = (void *)regbase;
>  	host->buswidth = bus_width;
>  	host->clksel = socfpga_dwmci_clksel;
> 
>