diff options
Diffstat (limited to 'drivers/auxdisplay/charlcd.c')
| -rw-r--r-- | drivers/auxdisplay/charlcd.c | 34 |
1 files changed, 7 insertions, 27 deletions
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c index bef6b85778b6..874c259a8829 100644 --- a/drivers/auxdisplay/charlcd.c +++ b/drivers/auxdisplay/charlcd.c @@ -288,31 +288,6 @@ static int charlcd_init_display(struct charlcd *lcd) } /* - * Parses an unsigned integer from a string, until a non-digit character - * is found. The empty string is not accepted. No overflow checks are done. - * - * Returns whether the parsing was successful. Only in that case - * the output parameters are written to. - * - * TODO: If the kernel adds an inplace version of kstrtoul(), this function - * could be easily replaced by that. - */ -static bool parse_n(const char *s, unsigned long *res, const char **next_s) -{ - if (!isdigit(*s)) - return false; - - *res = 0; - while (isdigit(*s)) { - *res = *res * 10 + (*s - '0'); - ++s; - } - - *next_s = s; - return true; -} - -/* * Parses a movement command of the form "(.*);", where the group can be * any number of subcommands of the form "(x|y)[0-9]+". * @@ -336,6 +311,7 @@ static bool parse_xy(const char *s, unsigned long *x, unsigned long *y) { unsigned long new_x = *x; unsigned long new_y = *y; + char *p; for (;;) { if (!*s) @@ -345,11 +321,15 @@ static bool parse_xy(const char *s, unsigned long *x, unsigned long *y) break; if (*s == 'x') { - if (!parse_n(s + 1, &new_x, &s)) + new_x = simple_strtoul(s + 1, &p, 10); + if (p == s + 1) return false; + s = p; } else if (*s == 'y') { - if (!parse_n(s + 1, &new_y, &s)) + new_y = simple_strtoul(s + 1, &p, 10); + if (p == s + 1) return false; + s = p; } else { return false; } |