linux-kernel - -Wuninitialized in drivers/accel/habanalabs/common/memory.c introduced by aa7b6367186e

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Date:   Tue, 19 Sep 2023 14:01:48 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Tomer Tayar <ttayar@...ana.ai>
Cc:     Oded Gabbay <ogabbay@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <llvm@...ts.linux.dev>
Subject: -Wuninitialized in drivers/accel/habanalabs/common/memory.c
 introduced by aa7b6367186e

commit aa7b6367186e ("accel/habanalabs: tiny refactor of hl_map_dmabuf()")

introduced a warning that's breaking the build in linux-next.

drivers/accel/habanalabs/common/memory.c:1735:11: error: variable
'hdev' is uninitialized when used here [-Werror,-Wuninitialized]
317 1735 | dev_dbg(hdev->dev, "Failed to map dmabuf because p2p is disabled\n");
318 | ^~~~
319/builds/linux/include/linux/dev_printk.h:155:18: note: expanded
from macro 'dev_dbg'
320 155 | dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
321 | ^~~
322/builds/linux/include/linux/dynamic_debug.h:274:7: note: expanded
from macro 'dynamic_dev_dbg'
323 274 | dev, fmt, ##__VA_ARGS__)
324 | ^~~
325/builds/linux/include/linux/dynamic_debug.h:250:59: note: expanded
from macro '_dynamic_func_call'
326 250 | _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
327 | ^~~~~~~~~~~
328/builds/linux/include/linux/dynamic_debug.h:248:65: note: expanded
from macro '_dynamic_func_call_cls'
329 248 | __dynamic_func_call_cls(__UNIQUE_ID(ddebug), cls, fmt, func,
##__VA_ARGS__)
330 | ^~~~~~~~~~~
331/builds/linux/include/linux/dynamic_debug.h:224:15: note: expanded
from macro '__dynamic_func_call_cls'
332 224 | func(&id, ##__VA_ARGS__); \
333 | ^~~~~~~~~~~
334/builds/linux/drivers/accel/habanalabs/common/memory.c:1731:24:
note: initialize the variable 'hdev' to silence this warning
335 1731 | struct hl_device *hdev;
336 | ^
337 | = NULL


Please fix. Also, please post your patches to LKML so people can post
info like this in response directly to your patch.  I could not find
aa7b6367186e on lore.
--
Thanks,
~Nick Desaulniers