coda: get rid of CODA_ALLOC()

These days we have kvzalloc() so we can delete CODA_ALLOC().

I made a couple related changes in coda_psdev_write().  First, I added
some error handling to avoid a NULL dereference if the allocation
failed.  Second, I used kvmalloc() instead of kvzalloc() because we copy
over the memory on the next line so there is no need to zero it first.

Link: http://lkml.kernel.org/r/e56010c822e7a7cbaa8a238cf82ad31c67eaa800.1558117389.git.jaharkes@cs.cmu.edu
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Fabian Frederick <fabf@skynet.be>
Cc: Mikko Rapeli <mikko.rapeli@iki.fi>
Cc: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Yann Droneaud <ydroneaud@opteya.com>
Cc: Zhouyang Jia <jiazhouyang09@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index ac130d469a3e..f74296acc59e 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -123,7 +123,11 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
                                 hdr.opcode, hdr.unique);
                         nbytes = size;
                 }
-                CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
+                dcbuf = kvmalloc(nbytes, GFP_KERNEL);
+                if (!dcbuf) {
+                        retval = -ENOMEM;
+                        goto out;
+                }
                 if (copy_from_user(dcbuf, buf, nbytes)) {
                         CODA_FREE(dcbuf, nbytes);
                         retval = -EFAULT;