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>

3 files changed, 7 insertions, 13 deletions

diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
index 126155cadfa9..1ea9521e79d7 100644
--- a/fs/coda/coda_linux.h
+++ b/fs/coda/coda_linux.h
@@ -63,16 +63,6 @@ unsigned short coda_flags_to_cflags(unsigned short);
 void coda_sysctl_init(void);
 void coda_sysctl_clean(void);
 
-#define CODA_ALLOC(ptr, cast, size) do { \
-    if (size < PAGE_SIZE) \
-        ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
-    else \
-        ptr = (cast)vzalloc((unsigned long) size); \
-    if (!ptr) \
-        pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
-} while (0)
-
-
 #define CODA_FREE(ptr, size) kvfree((ptr))
 
 /* inode to cnode access functions */
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;
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index cf1e662681a5..b6ac5fc98189 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -46,7 +46,7 @@ static void *alloc_upcall(int opcode, int size)
 {
         union inputArgs *inp;
 
-        CODA_ALLOC(inp, union inputArgs *, size);
+        inp = kvzalloc(size, GFP_KERNEL);
         if (!inp)
                 return ERR_PTR(-ENOMEM);
 
@@ -743,7 +743,7 @@ static int coda_upcall(struct venus_comm *vcp,
         sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
         if (!sig_req) goto exit;
 
-        CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
+        sig_req->uc_data = kvzalloc(sizeof(struct coda_in_hdr), GFP_KERNEL);
         if (!sig_req->uc_data) {
                 kfree(sig_req);
                 goto exit;