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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 fac9658cab ("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>
hifive-unleashed-5.1
Bart Van Assche 2017-10-16 08:47:45 -07:00 committed by Doug Ledford
parent e575a9bba0
commit 69abc735f4
1 changed files with 3 additions and 10 deletions
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13
drivers/infiniband/core/uverbs_ioctl.c
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@ -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;
}