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| author | Sam Ravnborg <sam@ravnborg.org> | 2016-04-24 15:24:33 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-20 18:33:37 -0700 |
| commit | 21916a4a2973ab1684e921689ef8a48a6626ac4c (patch) | |
| tree | 19b28389dd9131ed2ba73816b5d6978856a96b83 /drivers/sbus | |
| parent | 20c698d7791420fb242a0d49b80790fb2d951ace (diff) | |
| download | linux-21916a4a2973ab1684e921689ef8a48a6626ac4c.tar.bz2 | |
openprom: fix warning
Fix following warnings:
openprom.c:510:2: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]
openprom.c:503:3: warning: 'str' may be used uninitialized in this function [-Wmaybe-uninitialized]
openprom.c:459:8: warning: 'str' may be used uninitialized in this function [-Wmaybe-uninitialized]
openprom.c:422:7: warning: 'str' may be used uninitialized in this function [-Wmaybe-uninitialized]
Fixed by introducing PTR_ERR etc.
This simplified the code as a nice side effect.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/sbus')
| -rw-r--r-- | drivers/sbus/char/openprom.c | 40 |
1 files changed, 16 insertions, 24 deletions
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c index e077ebd89319..4612691c6619 100644 --- a/drivers/sbus/char/openprom.c +++ b/drivers/sbus/char/openprom.c @@ -383,20 +383,12 @@ static struct device_node *get_node(phandle n, DATA *data) } /* Copy in a whole string from userspace into kernelspace. */ -static int copyin_string(char __user *user, size_t len, char **ptr) +static char * copyin_string(char __user *user, size_t len) { - char *tmp; - if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0) - return -EINVAL; - - tmp = memdup_user_nul(user, len); - if (IS_ERR(tmp)) - return PTR_ERR(tmp); + return ERR_PTR(-EINVAL); - *ptr = tmp; - - return 0; + return memdup_user_nul(user, len); } /* @@ -415,9 +407,9 @@ static int opiocget(void __user *argp, DATA *data) dp = get_node(op.op_nodeid, data); - err = copyin_string(op.op_name, op.op_namelen, &str); - if (err) - return err; + str = copyin_string(op.op_name, op.op_namelen); + if (IS_ERR(str)) + return PTR_ERR(str); pval = of_get_property(dp, str, &len); err = 0; @@ -440,7 +432,7 @@ static int opiocnextprop(void __user *argp, DATA *data) struct device_node *dp; struct property *prop; char *str; - int err, len; + int len; if (copy_from_user(&op, argp, sizeof(op))) return -EFAULT; @@ -449,9 +441,9 @@ static int opiocnextprop(void __user *argp, DATA *data) if (!dp) return -EINVAL; - err = copyin_string(op.op_name, op.op_namelen, &str); - if (err) - return err; + str = copyin_string(op.op_name, op.op_namelen); + if (IS_ERR(str)) + return PTR_ERR(str); if (str[0] == '\0') { prop = dp->properties; @@ -494,14 +486,14 @@ static int opiocset(void __user *argp, DATA *data) if (!dp) return -EINVAL; - err = copyin_string(op.op_name, op.op_namelen, &str); - if (err) - return err; + str = copyin_string(op.op_name, op.op_namelen); + if (IS_ERR(str)) + return PTR_ERR(str); - err = copyin_string(op.op_buf, op.op_buflen, &tmp); - if (err) { + tmp = copyin_string(op.op_buf, op.op_buflen); + if (IS_ERR(tmp)) { kfree(str); - return err; + return PTR_ERR(tmp); } err = of_set_property(dp, str, tmp, op.op_buflen); |