kernel/git/stable/linux.git/drivers/base/soc.c, branch linux-5.15.y

driver core: soc: Unregister bus on early device registration failure

2026-09-14T11:20:33+00:00

[ Upstream commit 45dfa004893dfeae182ec27eddbd153c6d4ddbf9 ] soc_bus_register() registers the SoC bus before registering a deferred early SoC device. If soc_device_register() fails in that path, the function returns the error directly and leaves the bus registered. Store the returned SoC device pointer explicitly so the success and error cases are handled separately. On failure, clear soc_bus_registered and unregister the bus before returning the error. Fixes: 6e12db376b60 ("base: soc: Allow early registration of a single SoC device") Signed-off-by: Yuho Choi Link: https://patch.msgid.link/20260615180746.713540-1-dbgh9129@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

driver core: soc: remove layering violation for the soc_bus

2026-09-14T11:20:33+00:00

[ Upstream commit 90be1f15c39858a4f0f4346c39fa150697d231c1 ] The soc_bus code pokes around in the internal bus structures assuming that it "knows" if a field is not set that it has not been registered yet. That isn't a safe assumption, so just remove the layering violation entirely and keep track if the bus has been registered or not ourselves. Reviewed-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/20230130171059.1784057-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Stable-dep-of: 45dfa004893d ("driver core: soc: Unregister bus on early device registration failure") Signed-off-by: Sasha Levin

soc: fix comment for freeing soc_dev_attr

2020-12-09T18:46:31+00:00

The soc_dev_attr is stored soc_dev->attr during soc_device_register() so it could be used till the cleanup call: soc_device_unregister(). Therefore this memory should not be freed prior, but after unregistering soc device. Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20201207185952.261697-1-krzk@kernel.org Signed-off-by: Greg Kroah-Hartman

drivers core: Miscellaneous changes for sysfs_emit

2020-10-02T11:12:07+00:00

Change additional instances that could use sysfs_emit and sysfs_emit_at that the coccinelle script could not convert. o macros creating show functions with ## concatenation o unbound sprintf uses with buf+len for start of output to sysfs_emit_at o returns with ?: tests and sprintf to sysfs_emit o sysfs output with struct class * not struct device * arguments Miscellanea: o remove unnecessary initializations around these changes o consistently use int len for return length of show functions o use octal permissions and not S_ o rename a few show function names so DEVICE_ATTR_ can be used o use DEVICE_ATTR_ADMIN_RO where appropriate o consistently use const char *output for strings o checkpatch/style neatening Signed-off-by: Joe Perches Link: https://lore.kernel.org/r/8bc24444fe2049a9b2de6127389b57edfdfe324d.1600285923.git.joe@perches.com Signed-off-by: Greg Kroah-Hartman

drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions

2020-10-02T11:09:10+00:00

Convert the various sprintf fmaily calls in sysfs device show functions to sysfs_emit and sysfs_emit_at for PAGE_SIZE buffer safety. Done with: $ spatch -sp-file sysfs_emit_dev.cocci --in-place --max-width=80 . And cocci script: $ cat sysfs_emit_dev.cocci @@ identifier d_show; identifier dev, attr, buf; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... return - sprintf(buf, + sysfs_emit(buf, ...); ...> } @@ identifier d_show; identifier dev, attr, buf; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... return - snprintf(buf, PAGE_SIZE, + sysfs_emit(buf, ...); ...> } @@ identifier d_show; identifier dev, attr, buf; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... return - scnprintf(buf, PAGE_SIZE, + sysfs_emit(buf, ...); ...> } @@ identifier d_show; identifier dev, attr, buf; expression chr; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... return - strcpy(buf, chr); + sysfs_emit(buf, chr); ...> } @@ identifier d_show; identifier dev, attr, buf; identifier len; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... len = - sprintf(buf, + sysfs_emit(buf, ...); ...> return len; } @@ identifier d_show; identifier dev, attr, buf; identifier len; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... len = - snprintf(buf, PAGE_SIZE, + sysfs_emit(buf, ...); ...> return len; } @@ identifier d_show; identifier dev, attr, buf; identifier len; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... len = - scnprintf(buf, PAGE_SIZE, + sysfs_emit(buf, ...); ...> return len; } @@ identifier d_show; identifier dev, attr, buf; identifier len; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { <... - len += scnprintf(buf + len, PAGE_SIZE - len, + len += sysfs_emit_at(buf, len, ...); ...> return len; } @@ identifier d_show; identifier dev, attr, buf; expression chr; @@ ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf) { ... - strcpy(buf, chr); - return strlen(buf); + return sysfs_emit(buf, chr); } Signed-off-by: Joe Perches Link: https://lore.kernel.org/r/3d033c33056d88bbe34d4ddb62afd05ee166ab9a.1600285923.git.joe@perches.com Signed-off-by: Greg Kroah-Hartman

driver/base/soc: Use kobj_to_dev() API

2020-04-28T19:05:42+00:00

Use kobj_to_dev() API instead of container_of(). Signed-off-by: zhouchuangao Link: https://lore.kernel.org/r/1587878031-16591-1-git-send-email-zhouchuangao@xiaomi.com Signed-off-by: Greg Kroah-Hartman

base: soc: Handle custom soc information sysfs entries

2019-10-10T12:35:32+00:00

Soc framework exposed sysfs entries are not sufficient for some of the h/w platforms. Currently there is no interface where soc drivers can expose further information about their SoCs via soc framework. This change address this limitation where clients can pass their custom entries as attribute group and soc framework would expose them as sysfs properties. Signed-off-by: Murali Nalajala Reviewed-by: Bjorn Andersson Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1570480662-25252-1-git-send-email-mnalajal@codeaurora.org Signed-off-by: Greg Kroah-Hartman

base: soc: Export soc_device_register/unregister APIs

2019-08-05T21:56:31+00:00

Qcom Socinfo driver can be built as a module, so export these two APIs. Tested-by: Vinod Koul Signed-off-by: Vinod Koul Signed-off-by: Vaishali Thakkar Reviewed-by: Greg Kroah-Hartman Reviewed-by: Stephen Boyd Reviewed-by: Bjorn Andersson Signed-off-by: Bjorn Andersson

base: soc: Add serial_number attribute to soc

2019-08-05T21:56:30+00:00

Add new attribute named "serial_number" as a standard interface for user space to acquire the serial number of the device. For ST-Ericsson SoCs this is exposed by the cryptically named "soc_id" attribute, but this provides a human readable standardized name for this property. Tested-by: Vinod Koul Signed-off-by: Bjorn Andersson Signed-off-by: Vaishali Thakkar Reviewed-by: Greg Kroah-Hartman Reviewed-by: Stephen Boyd Reviewed-by: Vinod Koul Signed-off-by: Bjorn Andersson

base: soc: use put_device() instead of kfree()

2018-03-15T13:37:03+00:00

Never directly free @dev after calling device_register(), even if it returned an error! Always use put_device() to give up the reference initialized. Signed-off-by: Arvind Yadav Signed-off-by: Greg Kroah-Hartman