[U-Boot] [PATCH 3/9] cmd: bootefi: merge efi_install_fdt() and efi_process_fdt()

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Fri, Apr 19, 2019 at 06:06:08AM +0200, Heinrich Schuchardt wrote:
> On 4/19/19 5:22 AM, AKASHI Takahiro wrote:
> >This is a preparatory patch for reworking do_bootefi() in later patch.
> >For simplicity, merge two functions.
> >
> >Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> >---
> >  cmd/bootefi.c | 67 +++++++++++++++++++++------------------------------
> >  1 file changed, 28 insertions(+), 39 deletions(-)
> >
> >diff --git a/cmd/bootefi.c b/cmd/bootefi.c
> >index fb6703ce84f3..c6d6eb7312e8 100644
> >--- a/cmd/bootefi.c
> >+++ b/cmd/bootefi.c
> >@@ -185,62 +185,51 @@ static void efi_carve_out_dt_rsv(void *fdt)
> >  	}
> >  }
> >
> >-static efi_status_t efi_install_fdt(ulong fdt_addr)
> >-{
> >-	bootm_headers_t img = { 0 };
> >-	efi_status_t ret;
> >-	void *fdt;
> >-
> >-	fdt = map_sysmem(fdt_addr, 0);
> >-	if (fdt_check_header(fdt)) {
> >-		printf("ERROR: invalid device tree\n");
> >-		return EFI_INVALID_PARAMETER;
> >-	}
> >-
> >-	/* Create memory reservation as indicated by the device tree */
> >-	efi_carve_out_dt_rsv(fdt);
> >-
> >-	/* Prepare fdt for payload */
> >-	ret = copy_fdt(&fdt);
> >-	if (ret)
> >-		return ret;
> >-
> >-	if (image_setup_libfdt(&img, fdt, 0, NULL)) {
> >-		printf("ERROR: failed to process device tree\n");
> >-		return EFI_LOAD_ERROR;
> >-	}
> >-
> >-	/* Link to it in the efi tables */
> >-	ret = efi_install_configuration_table(&efi_guid_fdt, fdt);
> >-	if (ret != EFI_SUCCESS)
> >-		return EFI_OUT_OF_RESOURCES;
> >-
> >-	return ret;
> >-}
> >-
> >  /**
> >- * efi_process_fdt() - process fdt passed by a command argument
> >+ * efi_install_fdt() - install fdt passed by a command argument
> >   * @fdt_opt:	pointer to argument
> >   * Return:	status code
> >   *
> >   * If specified, fdt will be installed as configuration table,
> >   * otherwise no fdt will be passed.
> >   */
> >-static efi_status_t efi_process_fdt(const char *fdt_opt)
> >+static efi_status_t efi_install_fdt(const char *fdt_opt)
> >  {
> >  	unsigned long fdt_addr;
> >+	void *fdt;
> >+	bootm_headers_t img = { 0 };
> >  	efi_status_t ret;
> >
> >  	if (fdt_opt) {
> >+		/* Install device tree */
> >  		fdt_addr = simple_strtoul(fdt_opt, NULL, 16);
> >  		if (!fdt_addr && *fdt_opt != '0')
> >  			return EFI_INVALID_PARAMETER;
> >
> >-		/* Install device tree */
> >-		ret = efi_install_fdt(fdt_addr);
> >+		fdt = map_sysmem(fdt_addr, 0);
> >+		if (fdt_check_header(fdt)) {
> >+			printf("ERROR: invalid device tree\n");
> >+			return EFI_INVALID_PARAMETER;
> >+		}
> >+
> >+		/* Create memory reservation as indicated by the device tree */
> >+		efi_carve_out_dt_rsv(fdt);
> >+
> >+		/* Prepare fdt for payload */
> >+		ret = copy_fdt(&fdt);
> >+		if (ret)
> >+			return ret;
> >+
> >+		if (image_setup_libfdt(&img, fdt, 0, NULL)) {
> >+			printf("ERROR: failed to process device tree\n");
> >+			return EFI_LOAD_ERROR;
> >+		}
> >+
> >+		/* Link to it in the efi tables */
> >+		ret = efi_install_configuration_table(&efi_guid_fdt, fdt);
> >  		if (ret != EFI_SUCCESS) {
> >  			printf("ERROR: failed to install device tree\n");
> >-			return ret;
> >+			return EFI_OUT_OF_RESOURCES;
> 
> Why do you want to change the return value here? If there is not enough
> space efi_install_configuration_table() will return EFI_OUT_OF_RESOURCES
> by itself. Other possible error codes are:

The original code returns EFI_LOAD_ERROR, so I changed it.

> * EFI_INVALID_PARAMETER if you do not provide a GUID. This cannot occur.
> * EFI_NOT_FOUND if fdt is NULL.
> 
> I you are ok with it I would apply the patch with the original line
> 			return ret;

Go ahead.
# You don't need additional patch, Just leave a note in commit message.

Thanks,
-Takahiro Akashi

> Otherwise
> 
> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
> 
> >  		}
> >  	} else {
> >  		/* Remove device tree. EFI_NOT_FOUND can be ignored here */
> >@@ -456,7 +445,7 @@ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> >  	if (argc < 2)
> >  		return CMD_RET_USAGE;
> >
> >-	r = efi_process_fdt(argc > 2 ? argv[2] : NULL);
> >+	r = efi_install_fdt(argc > 2 ? argv[2] : NULL);
> >  	if (r == EFI_INVALID_PARAMETER)
> >  		return CMD_RET_USAGE;
> >  	else if (r != EFI_SUCCESS)
> >
>