From: Vyacheslav Dubeyko <slava@xxxxxxxxxxx> Subject: [PATCH v2 06/15] hfsplus: fix remount issue Current implementation of HFS+ driver has small issue with remount option. Namely, for example, you are unable to remount from RO mode into RW mode by means of command "mount -o remount,rw /dev/loop0 /mnt/hfsplus". Trying to execute sequence of commands is resulted with error message: mount /dev/loop0 /mnt/hfsplus mount -o remount,ro /dev/loop0 /mnt/hfsplus mount -o remount,rw /dev/loop0 /mnt/hfsplus mount: you must specify the filesystem type mount -t hfsplus -o remount,rw /dev/loop0 /mnt/hfsplus mount: /mnt/hfsplus not mounted or bad option The reason of such issue is failure of mount syscall: mount("/dev/loop0", "/mnt/hfsplus", 0x2282a60, MS_MGC_VAL|MS_REMOUNT, NULL) = -1 EINVAL (Invalid argument) Namely, hfsplus_parse_options_remount() method receives empty "input" argument and return false in such case. As a result, hfsplus_remount() returns -EINVAL error code. This patch fixes the issue by means of return true for the case of empty "input" argument in hfsplus_parse_options_remount() method. Signed-off-by: Vyacheslav Dubeyko <slava@xxxxxxxxxxx> CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> CC: Christoph Hellwig <hch@xxxxxxxxxxxxx> CC: Hin-Tak Leung <htl10@xxxxxxxxxxxxxxxxxxxxx> --- fs/hfsplus/options.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c index 4ad835e..60829cd 100644 --- a/fs/hfsplus/options.c +++ b/fs/hfsplus/options.c @@ -76,7 +76,7 @@ int hfsplus_parse_options_remount(char *input, struct hfsplus_sb_info *sbi) int token; if (!input) - return 0; + return 1; while ((p = strsep(&input, ",")) != NULL) { if (!*p) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html