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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-02-15 22:49:24 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-03-24 20:56:52 +0100 |
| commit | 421696887b0da241401710e83b0dffcc195bc484 (patch) | |
| tree | f8a0fdf5aa9d5e2d79397cdce23804839e4ef359 | |
| parent | 1c4fb577aa5aeeace026d8295936947f0f0743f0 (diff) | |
| download | linux-421696887b0da241401710e83b0dffcc195bc484.tar.gz linux-421696887b0da241401710e83b0dffcc195bc484.tar.bz2 linux-421696887b0da241401710e83b0dffcc195bc484.zip | |
ieee1394: raw1394: add sparse annotations to raw1394_compat_write
Eliminate the following warnings in raw1394_compat_write()'s error
return path, seen on x86-64 with CONFIG_COMPAT=y:
drivers/ieee1394/raw1394.c:381:17: warning: incorrect type in return expression (different address spaces)
drivers/ieee1394/raw1394.c:381:17: expected char const [noderef] <asn:1>*
drivers/ieee1394/raw1394.c:381:17: got void *
drivers/ieee1394/raw1394.c:2252:14: warning: incorrect type in argument 1 (different address spaces)
drivers/ieee1394/raw1394.c:2252:14: expected void const *ptr
drivers/ieee1394/raw1394.c:2252:14: got char const [noderef] <asn:1>*[assigned] buffer
drivers/ieee1394/raw1394.c:2253:19: warning: incorrect type in argument 1 (different address spaces)
drivers/ieee1394/raw1394.c:2253:19: expected void const *ptr
drivers/ieee1394/raw1394.c:2253:19: got char const [noderef] <asn:1>*[assigned] buffer
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
| -rw-r--r-- | drivers/ieee1394/raw1394.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/ieee1394/raw1394.c b/drivers/ieee1394/raw1394.c index 281229b027f5..9b71390b0a0b 100644 --- a/drivers/ieee1394/raw1394.c +++ b/drivers/ieee1394/raw1394.c @@ -369,6 +369,7 @@ static const char __user *raw1394_compat_write(const char __user *buf) { struct compat_raw1394_req __user *cr = (typeof(cr)) buf; struct raw1394_request __user *r; + r = compat_alloc_user_space(sizeof(struct raw1394_request)); #define C(x) __copy_in_user(&r->x, &cr->x, sizeof(r->x)) @@ -378,7 +379,8 @@ static const char __user *raw1394_compat_write(const char __user *buf) C(tag) || C(sendb) || C(recvb)) - return ERR_PTR(-EFAULT); + return (__force const char __user *)ERR_PTR(-EFAULT); + return (const char __user *)r; } #undef C @@ -389,6 +391,7 @@ static int raw1394_compat_read(const char __user *buf, struct raw1394_request *r) { struct compat_raw1394_req __user *cr = (typeof(cr)) buf; + if (!access_ok(VERIFY_WRITE, cr, sizeof(struct compat_raw1394_req)) || P(type) || P(error) || @@ -400,6 +403,7 @@ raw1394_compat_read(const char __user *buf, struct raw1394_request *r) P(sendb) || P(recvb)) return -EFAULT; + return sizeof(struct compat_raw1394_req); } #undef P @@ -2249,8 +2253,8 @@ static ssize_t raw1394_write(struct file *file, const char __user * buffer, sizeof(struct compat_raw1394_req) != sizeof(struct raw1394_request)) { buffer = raw1394_compat_write(buffer); - if (IS_ERR(buffer)) - return PTR_ERR(buffer); + if (IS_ERR((__force void *)buffer)) + return PTR_ERR((__force void *)buffer); } else #endif if (count != sizeof(struct raw1394_request)) { |