From: Dan Williams <dan.j.williams@intel.com>
To: Li Ming <ming.li@zohomail.com>, Dan Williams <dan.j.williams@intel.com>
Cc: <linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<dave@stgolabs.net>, <jonathan.cameron@huawei.com>,
<dave.jiang@intel.com>, <alison.schofield@intel.com>,
<vishal.l.verma@intel.com>, <ira.weiny@intel.com>
Subject: Re: [PATCH v2 5/7] cxl/core: Use guard() to drop goto pattern of cxl_dpa_alloc()
Date: Wed, 19 Feb 2025 17:29:52 -0800 [thread overview]
Message-ID: <67b6859048d26_2d1e29482@dwillia2-xfh.jf.intel.com.notmuch> (raw)
In-Reply-To: <55f67727-ed24-4ac4-97c1-95b65d110daf@zohomail.com>
Li Ming wrote:
[..]
> After __cxl_dpa_alloc(), a 'devm_add_action_or_reset(&port->dev,
> cxl_dpa_release, cxled)' will be invoked, cxl_dpa_rwsem is possible to
> be held in cxl_dpa_release() in devm_add_action_or_reset() failure
> case.
>
> So I create __cxl_dpa_alloc() to hold cxl_dpa_rwsem for the operations
> needed cxl_dpa_resem protection, make sure that the cxl_dpa_rwsem is
> released before devm_add_action_or_reset() invoking.
Ah, got it, missing context, makes sense.
next prev parent reply other threads:[~2025-02-20 1:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-17 14:48 [PATCH v2 0/7] Use guard() instead of rwsem locking Li Ming
2025-02-17 14:48 ` [PATCH v2 1/7] cxl/core: Use guard() to replace open-coded down_read/write() Li Ming
2025-02-19 17:11 ` Dave Jiang
2025-02-19 17:33 ` Alison Schofield
2025-02-17 14:48 ` [PATCH v2 2/7] cxl/core: cxl_mem_sanitize() cleanup Li Ming
2025-02-19 17:12 ` Dave Jiang
2025-02-19 17:34 ` Alison Schofield
2025-02-17 14:48 ` [PATCH v2 3/7] cxl/memdev: cxl_memdev_ioctl() cleanup Li Ming
2025-02-19 17:16 ` Dave Jiang
2025-02-19 17:35 ` Alison Schofield
2025-02-17 14:48 ` [PATCH v2 4/7] cxl/core: Use guard() to drop the goto pattern of cxl_dpa_free() Li Ming
2025-02-19 17:19 ` Dave Jiang
2025-02-19 17:36 ` Alison Schofield
2025-02-17 14:48 ` [PATCH v2 5/7] cxl/core: Use guard() to drop goto pattern of cxl_dpa_alloc() Li Ming
2025-02-19 17:21 ` Dave Jiang
2025-02-19 17:36 ` Alison Schofield
2025-02-20 1:01 ` Dan Williams
2025-02-20 1:26 ` Li Ming
2025-02-20 1:29 ` Dan Williams [this message]
2025-02-17 14:48 ` [PATCH v2 6/7] cxl/region: Drop goto pattern in cxl_dax_region_alloc() Li Ming
2025-02-19 17:23 ` Dave Jiang
2025-02-19 17:37 ` Alison Schofield
2025-02-17 14:48 ` [PATCH v2 7/7] cxl/region: Drop goto pattern of construct_region() Li Ming
2025-02-18 17:24 ` Jonathan Cameron
2025-02-19 17:24 ` Dave Jiang
2025-02-19 17:38 ` Alison Schofield
2025-02-20 1:04 ` Dan Williams
2025-02-20 1:42 ` Li Ming
2025-02-18 17:54 ` [PATCH v2 0/7] Use guard() instead of rwsem locking Davidlohr Bueso
2025-02-19 20:46 ` Ira Weiny
2025-02-19 21:09 ` Dave Jiang
2025-02-20 0:43 ` Li Ming
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