mtd: fix wrong open() return code checks

[librecmc/librecmc.git] / package / mtd / src / mtd.c

diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c
index bd966ab7dca699a16aadcfdc61ab0fb88fdd427d..2639b4ebb5e2309f24bbe78ec5da987ad2812b54 100644 (file)
--- a/package/mtd/src/mtd.c
+++ b/package/mtd/src/mtd.c
@@ -98,13 +98,13 @@ int mtd_check_open(const char *mtd)
        fd = mtd_open(mtd, false);
        if(fd < 0) {
                fprintf(stderr, "Could not open mtd device: %s\n", mtd);
-               return 0;
+               return -1;
        }
 
        if(ioctl(fd, MEMGETINFO, &mtdInfo)) {
                fprintf(stderr, "Could not get MTD device info from %s\n", mtd);
                close(fd);
-               return 0;
+               return -1;
        }
        mtdsize = mtdInfo.size;
        erasesize = mtdInfo.erasesize;
@@ -162,7 +162,7 @@ static int mtd_check(const char *mtd)
                }
 
                fd = mtd_check_open(mtd);
-               if (!fd)
+               if (fd < 0)
                        return 0;
 
                if (!buf)
@@ -199,7 +199,7 @@ mtd_unlock(const char *mtd)
                }
 
                fd = mtd_check_open(mtd);
-               if(fd <= 0) {
+               if(fd < 0) {
                        fprintf(stderr, "Could not open mtd device: %s\n", mtd);
                        exit(1);
                }
@@ -230,7 +230,7 @@ mtd_erase(const char *mtd)
                fprintf(stderr, "Erasing %s ...\n", mtd);
 
        fd = mtd_check_open(mtd);
-       if(fd <= 0) {
+       if(fd < 0) {
                fprintf(stderr, "Could not open mtd device: %s\n", mtd);
                exit(1);
        }
@@ -260,7 +260,7 @@ mtd_refresh(const char *mtd)
                fprintf(stderr, "Refreshing mtd partition %s ... ", mtd);
 
        fd = mtd_check_open(mtd);
-       if(fd <= 0) {
+       if(fd < 0) {
                fprintf(stderr, "Could not open mtd device: %s\n", mtd);
                exit(1);
        }