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authorLinus Torvalds <torvalds@linux-foundation.org>2022-06-03 11:48:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-06-03 11:48:47 -0700
commit500a434fc593f1fdb274c0e6fe09a0b9c0711a4b (patch)
treee05efb88b90b6fa631bc22f2794233529b6c1de3 /drivers/amba
parent6f9b5ed8caddfbc94af8307c557ed57a8ec5c65c (diff)
parentb232b02bf3c205b13a26dcec08e53baddd8e59ed (diff)
Merge tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH: "Here is the set of driver core changes for 5.19-rc1. Lots of tiny driver core changes and cleanups happened this cycle, but the two major things are: - firmware_loader reorganization and additions including the ability to have XZ compressed firmware images and the ability for userspace to initiate the firmware load when it needs to, instead of being always initiated by the kernel. FPGA devices specifically want this ability to have their firmware changed over the lifetime of the system boot, and this allows them to work without having to come up with yet-another-custom-uapi interface for loading firmware for them. - physical location support added to sysfs so that devices that know this information, can tell userspace where they are located in a common way. Some ACPI devices already support this today, and more bus types should support this in the future. Smaller changes include: - driver_override api cleanups and fixes - error path cleanups and fixes - get_abi script fixes - deferred probe timeout changes. It's that last change that I'm the most worried about. It has been reported to cause boot problems for a number of systems, and I have a tested patch series that resolves this issue. But I didn't get it merged into my tree before 5.18-final came out, so it has not gotten any linux-next testing. I'll send the fixup patches (there are 2) as a follow-on series to this pull request. All have been tested in linux-next for weeks, with no reported issues other than the above-mentioned boot time-outs" * tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits) driver core: fix deadlock in __device_attach kernfs: Separate kernfs_pr_cont_buf and rename_lock. topology: Remove unused cpu_cluster_mask() driver core: Extend deferred probe timeout on driver registration MAINTAINERS: add Russ Weight as a firmware loader maintainer driver: base: fix UAF when driver_attach failed test_firmware: fix end of loop test in upload_read_show() driver core: location: Add "back" as a possible output for panel driver core: location: Free struct acpi_pld_info *pld driver core: Add "*" wildcard support to driver_async_probe cmdline param driver core: location: Check for allocations failure arch_topology: Trace the update thermal pressure kernfs: Rename kernfs_put_open_node to kernfs_unlink_open_file. export: fix string handling of namespace in EXPORT_SYMBOL_NS rpmsg: use local 'dev' variable rpmsg: Fix calling device_lock() on non-initialized device firmware_loader: describe 'module' parameter of firmware_upload_register() firmware_loader: Move definitions from sysfs_upload.h to sysfs.h firmware_loader: Fix configs for sysfs split selftests: firmware: Add firmware upload selftests ...
Diffstat (limited to 'drivers/amba')
-rw-r--r--drivers/amba/bus.c28
1 files changed, 4 insertions, 24 deletions
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 3a2adeaef5ce..0e3ed5eb367b 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -98,31 +98,11 @@ static ssize_t driver_override_store(struct device *_dev,
const char *buf, size_t count)
{
struct amba_device *dev = to_amba_device(_dev);
- char *driver_override, *old, *cp;
-
- /* We need to keep extra room for a newline */
- if (count >= (PAGE_SIZE - 1))
- return -EINVAL;
-
- driver_override = kstrndup(buf, count, GFP_KERNEL);
- if (!driver_override)
- return -ENOMEM;
-
- cp = strchr(driver_override, '\n');
- if (cp)
- *cp = '\0';
-
- device_lock(_dev);
- old = dev->driver_override;
- if (strlen(driver_override)) {
- dev->driver_override = driver_override;
- } else {
- kfree(driver_override);
- dev->driver_override = NULL;
- }
- device_unlock(_dev);
+ int ret;
- kfree(old);
+ ret = driver_set_override(_dev, &dev->driver_override, buf, count);
+ if (ret)
+ return ret;
return count;
}