| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20240110095358.473663-1-alexander.stein@ew.tq-group.com> Date: Wed, 10 Jan 2024 10:53:58 +0100 From: Alexander Stein <alexander.stein@...tq-group.com> To: Mark Brown <broonie@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J . Wysocki" <rafael@...nel.org> Cc: Alexander Stein <alexander.stein@...tq-group.com>, linux-kernel@...r.kernel.org Subject: [PATCH 1/1] regmap: debugfs: runtime resume a device when reading registers If the registers shall be read from device, runtime resume it in order to enable a possiblly attached power domain before accessing the device. Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com> --- drivers/base/regmap/regmap-debugfs.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index fb84cda92a753..063ede23173af 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -12,6 +12,7 @@ #include <linux/uaccess.h> #include <linux/device.h> #include <linux/list.h> +#include <linux/pm_runtime.h> #include "internal.h" @@ -233,6 +234,10 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, if (!buf) return -ENOMEM; + ret = pm_runtime_resume_and_get(map->dev); + if (ret) + goto out_free; + regmap_calc_tot_len(map, buf, count); /* Work out which register we're starting at */ @@ -277,6 +282,8 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, *ppos += buf_pos; out: + pm_runtime_put(map->dev); +out_free: kfree(buf); return ret; } -- 2.34.1
Powered by blists - more mailing lists