linux-kernel - [PATCH v2 0/4] cxl/mem: Fix memdev device setup

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Date:   Mon, 29 Mar 2021 19:47:39 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     linux-cxl@...r.kernel.org
Cc:     Ben Widawsky <ben.widawsky@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>, linux-kernel@...r.kernel.org,
        vishal.l.verma@...el.com, ira.weiny@...el.com,
        alison.schofield@...el.com
Subject: [PATCH v2 0/4]  cxl/mem: Fix memdev device setup

Changes since v1: [1]
- switch percpu_ref to srcu (Jason)
- introduce cxl_memdev_alloc() (Jason)

[1]: http://lore.kernel.org/r/161661970558.1721612.10441826898835759137.stgit@dwillia2-desk3.amr.corp.intel.com

---

A small collection of fixes mostly inspired by Jason's recognition of
dev_set_name() error handling mistakes on other driver review.

dev_set_name() can fail and although device_add() might catch it that's
not a reliable assumption. While fixing that I noticed that the unwind
handling for cdev_device_add() failures leaked the device name.

The sysfs_emit() fixup and unpublishing of device power management files
are just sanity cleanups.

---

Dan Williams (4):
      cxl/mem: Use sysfs_emit() for attribute show routines
      cxl/mem: Fix synchronization mechanism for device removal vs ioctl operations
      cxl/mem: Do not rely on device_add() side effects for dev_set_name() failures
      cxl/mem: Disable cxl device power management


 drivers/cxl/mem.c |  127 +++++++++++++++++++++++++++++++----------------------
 1 file changed, 75 insertions(+), 52 deletions(-)

base-commit: a38fd8748464831584a19438cbb3082b5a2dab15