staging: gs_fpgaboot: return valid error codes

The return values on error are modified to be valid error codes. Theses
error codes are propagated back to the init function's return.

Signed-off-by: Jacob von Chorus <jacobvonchorus@cwphoto.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/gs_fpgaboot/gs_fpgaboot.c b/drivers/staging/gs_fpgaboot/gs_fpgaboot.c
index ff59708..bcbdc73 100644 (file)
--- a/drivers/staging/gs_fpgaboot/gs_fpgaboot.c
+++ b/drivers/staging/gs_fpgaboot/gs_fpgaboot.c
@@ -84,7 +84,7 @@ static int readlength_bitstream(u8 *bitdata, int *lendata, int *offset)
        /* make sure it is section 'e' */
        if (tbuf[0] != 'e') {
                pr_err("error: length section is not 'e', but %c\n", tbuf[0]);
-               return -1;
+               return -EINVAL;
        }
 
        /* read 4bytes length */
@@ -107,7 +107,7 @@ static int readmagic_bitstream(u8 *bitdata, int *offset)
        r = memcmp(buf, bits_magic, 13);
        if (r) {
                pr_err("error: corrupted header");
-               return -1;
+               return -EINVAL;
        }
        pr_info("bitstream file magic number Ok\n");
 
@@ -184,7 +184,7 @@ static int gs_read_image(struct fpgaimage *fimage)
                break;
        default:
                pr_err("unsupported fpga image format\n");
-               return -1;
+               return -EINVAL;
        }
 
        gs_print_header(fimage);
@@ -223,7 +223,7 @@ static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
        if (!xl_supported_prog_bus_width(bus_bytes)) {
                pr_err("unsupported program bus width %d\n",
                       bus_bytes);
-               return -1;
+               return -EINVAL;
        }
 
        /* Bring csi_b, rdwr_b Low and program_b High */
@@ -250,7 +250,7 @@ static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
        /* Check INIT_B */
        if (xl_get_init_b() == 0) {
                pr_err("init_b 0\n");
-               return -1;
+               return -EIO;
        }
 
        while (xl_get_done_b() == 0) {
@@ -262,7 +262,7 @@ static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
 
        if (cnt > MAX_WAIT_DONE) {
                pr_err("fpga download fail\n");
-               return -1;
+               return -EIO;
        }
 
        pr_info("download fpgaimage\n");
@@ -351,7 +351,7 @@ err_out2:
 err_out1:
        kfree(fimage);
 
-       return -1;
+       return err;
 }
 
 static int __init gs_fpgaboot_init(void)