tools: kwboot: Avoid code repetition in kwboot_img_patch()

Change kwboot_img_patch() to avoid code repetition of setting errno to
EINVAL.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 9eb007f..9da5b42 100644 (file)
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -1386,7 +1386,6 @@ _copy_baudrate_change_code(struct main_hdr_v1 *hdr, void *dst, int pre,
 static int
 kwboot_img_patch(void *img, size_t *size, int baudrate)
 {
-       int rc;
        struct main_hdr_v1 *hdr;
        uint32_t srcaddr;
        uint8_t csum;
@@ -1394,33 +1393,25 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
        int image_ver;
        int is_secure;
 
-       rc = -1;
        hdr = img;
 
-       if (*size < sizeof(struct main_hdr_v1)) {
-               errno = EINVAL;
-               goto out;
-       }
+       if (*size < sizeof(struct main_hdr_v1))
+               goto err;
 
        image_ver = kwbimage_version(img);
        if (image_ver != 0 && image_ver != 1) {
                fprintf(stderr, "Invalid image header version\n");
-               errno = EINVAL;
-               goto out;
+               goto err;
        }
 
        hdrsz = kwbheader_size(hdr);
 
-       if (*size < hdrsz) {
-               errno = EINVAL;
-               goto out;
-       }
+       if (*size < hdrsz)
+               goto err;
 
        csum = kwboot_hdr_csum8(hdr) - hdr->checksum;
-       if (csum != hdr->checksum) {
-               errno = EINVAL;
-               goto out;
-       }
+       if (csum != hdr->checksum)
+               goto err;
 
        if (image_ver == 0) {
                struct main_hdr_v0 *hdr_v0 = img;
@@ -1433,10 +1424,9 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 
        switch (hdr->blockid) {
        case IBR_HDR_SATA_ID:
-               if (srcaddr < 1) {
-                       errno = EINVAL;
-                       goto out;
-               }
+               if (srcaddr < 1)
+                       goto err;
+
                hdr->srcaddr = cpu_to_le32((srcaddr - 1) * 512);
                break;
 
@@ -1459,10 +1449,8 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
        }
 
        if (hdrsz > le32_to_cpu(hdr->srcaddr) ||
-           *size < le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize)) {
-               errno = EINVAL;
-               goto out;
-       }
+           *size < le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize))
+               goto err;
 
        is_secure = kwboot_img_is_secure(img);
 
@@ -1470,8 +1458,7 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
                if (is_secure) {
                        fprintf(stderr,
                                "Image has secure header with signature for non-UART booting\n");
-                       errno = EINVAL;
-                       goto out;
+                       goto err;
                }
 
                kwboot_printv("Patching image boot signature to UART\n");
@@ -1485,15 +1472,13 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
                if (image_ver == 0) {
                        fprintf(stderr,
                                "Cannot inject code for changing baudrate into v0 image header\n");
-                       errno = EINVAL;
-                       goto out;
+                       goto err;
                }
 
                if (is_secure) {
                        fprintf(stderr,
                                "Cannot inject code for changing baudrate into image with secure header\n");
-                       errno = EINVAL;
-                       goto out;
+                       goto err;
                }
 
                /*
@@ -1529,8 +1514,7 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 
                if (is_secure) {
                        fprintf(stderr, "Cannot align image with secure header\n");
-                       errno = EINVAL;
-                       goto out;
+                       goto err;
                }
 
                kwboot_printv("Aligning image header to Xmodem block size\n");
@@ -1540,9 +1524,10 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
        hdr->checksum = kwboot_hdr_csum8(hdr) - csum;
 
        *size = le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize);
-       rc = 0;
-out:
-       return rc;
+       return 0;
+err:
+       errno = EINVAL;
+       return -1;
 }
 
 static void