diff options
| author | Marius Bakke <marius@gnu.org> | 2022-12-15 16:28:14 +0100 |
|---|---|---|
| committer | Marius Bakke <marius@gnu.org> | 2022-12-17 17:08:50 +0100 |
| commit | 4d94cdf69889043dd8d9b1305f5f3946ec0f8ff6 (patch) | |
| tree | c6b4b9653a0344ffffb41d09e90ac88c1af865dd /gnu/build | |
| parent | 88908c6edce845b8737a18dda415f162d699384a (diff) | |
activation: Firmware activation handles missing support in kernel.
* gnu/build/activation.scm (activate-firmware): Check if firmware loading is
enabled before attempting to use it.
Diffstat (limited to 'gnu/build')
| -rw-r--r-- | gnu/build/activation.scm | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gnu/build/activation.scm b/gnu/build/activation.scm index 10c9045740..eea2233563 100644 --- a/gnu/build/activation.scm +++ b/gnu/build/activation.scm @@ -363,9 +363,14 @@ second element is the name it should appear at, such as: "Tell the kernel to look for device firmware under DIRECTORY. This mechanism bypasses udev: it allows Linux to handle firmware loading directly by itself, without having to resort to a \"user helper\"." - (call-with-output-file "/sys/module/firmware_class/parameters/path" - (lambda (port) - (display directory port)))) + + ;; If the kernel was built without firmware loading support, this file + ;; does not exist. Do nothing in that case. + (let ((firmware-path "/sys/module/firmware_class/parameters/path")) + (when (file-exists? firmware-path) + (call-with-output-file firmware-path + (lambda (port) + (display directory port)))))) (define (activate-ptrace-attach) "Allow users to PTRACE_ATTACH their own processes. |