RDMA/uverbs: Make the code in ib_uverbs_cmd_verbs() less confusing

This patch reduces the number of #ifdefs and also avoids that
smatch reports the following:

drivers/infiniband/core/uverbs_ioctl.c:276: ib_uverbs_cmd_verbs() warn: if statement not indented
drivers/infiniband/core/uverbs_ioctl.c:280: ib_uverbs_cmd_verbs() warn: possible memory leak of 'ctx'
drivers/infiniband/core/uverbs_ioctl.c:315: ib_uverbs_cmd_verbs() warn: if statement not indented

References: commit fac9658cabb9 ("IB/core: Add new ioctl interface")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Matan Barak <matanb@mellanox.com>
Cc: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c
index 5286ad5..71ff264 100644 (file)
--- a/drivers/infiniband/core/uverbs_ioctl.c
+++ b/drivers/infiniband/core/uverbs_ioctl.c
@@ -241,9 +241,7 @@ static long ib_uverbs_cmd_verbs(struct ib_device *ib_dev,
        struct uverbs_attr *curr_attr;
        unsigned long *curr_bitmap;
        size_t ctx_size;
-#ifdef UVERBS_OPTIMIZE_USING_STACK_SZ
        uintptr_t data[UVERBS_OPTIMIZE_USING_STACK_SZ / sizeof(uintptr_t)];
-#endif
 
        if (hdr->reserved)
                return -EINVAL;
@@ -269,13 +267,10 @@ static long ib_uverbs_cmd_verbs(struct ib_device *ib_dev,
                        (method_spec->num_child_attrs / BITS_PER_LONG +
                         method_spec->num_buckets);
 
-#ifdef UVERBS_OPTIMIZE_USING_STACK_SZ
        if (ctx_size <= UVERBS_OPTIMIZE_USING_STACK_SZ)
                ctx = (void *)data;
-
        if (!ctx)
-#endif
-       ctx = kmalloc(ctx_size, GFP_KERNEL);
+               ctx = kmalloc(ctx_size, GFP_KERNEL);
        if (!ctx)
                return -ENOMEM;
 
@@ -311,10 +306,8 @@ static long ib_uverbs_cmd_verbs(struct ib_device *ib_dev,
        err = uverbs_handle_method(buf, ctx->uattrs, hdr->num_attrs, ib_dev,
                                   file, method_spec, ctx->uverbs_attr_bundle);
 out:
-#ifdef UVERBS_OPTIMIZE_USING_STACK_SZ
-       if (ctx_size > UVERBS_OPTIMIZE_USING_STACK_SZ)
-#endif
-       kfree(ctx);
+       if (ctx != (void *)data)
+               kfree(ctx);
        return err;
 }