[PATCH] fs/coda: get rid of CODA_ALLOC()

Dan Carpenter
2019-02-14T06:58:48Z

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.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
fs/coda/coda_linux.h | 10 ----------
fs/coda/psdev.c | 6 +++++-
fs/coda/upcall.c | 4 ++--
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 c5234c21b539..49d44a485c9a 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -124,7 +124,11 @@ 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 1175a1722411..203f029bcdc3 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;
--
2.17.1