diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-04 09:19:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-04 09:19:02 -0700 |
| commit | ce57e981f2b996aaca2031003b3f866368307766 (patch) | |
| tree | 7ab6b29e6b0013519f3418bbaf8f661e064861ba /drivers | |
| parent | e1cc485262846dcad931bf85ee655cbbb815bfe6 (diff) | |
| download | linux-ce57e981f2b996aaca2031003b3f866368307766.tar.bz2 | |
firmware: use 'kernel_read()' to read firmware into kernel buffer
Fengguang correctly points out that the firmware reading should not use
vfs_read(), since the buffer is in kernel space.
The vfs_read() just happened to work for kernel threads, but sparse
warns about the incorrect address spaces, and it's definitely incorrect
and could fail for other users of the firmware loading.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/firmware_class.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index e85763de928f..81541452887b 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -58,7 +58,6 @@ static noinline long fw_file_size(struct file *file) static bool fw_read_file_contents(struct file *file, struct firmware *fw) { - loff_t pos; long size; char *buf; @@ -68,8 +67,7 @@ static bool fw_read_file_contents(struct file *file, struct firmware *fw) buf = vmalloc(size); if (!buf) return false; - pos = 0; - if (vfs_read(file, buf, size, &pos) != size) { + if (kernel_read(file, 0, buf, size) != size) { vfree(buf); return false; } |