[PATCH] dracut-module-setup: Fix DRM module inclusion test for hyper-v

[Kairui Song]

We test if to include the drm module or not by testing if there are any
drm entry in sysfs. But there is an exception for hyper-v, DRM module
take care of hyperv's framebuffer driver as well but hyperv_fb will
not create any drm entry. So currently we got black screen on
hyperv guest.

Fix by detect hyperv's special entry as well.
---
 dracut-module-setup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index d1f9f5f..a10244b 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -20,7 +20,7 @@ check() {
 depends() {
     local _dep="base shutdown"

-    if [ -n "$( find /sys/devices -name drm )" ]; then
+    if [ -n "$( find /sys/devices -name drm )" ] || [ -d /sys/module/hyperv_fb ]; then
         _dep="$_dep drm"
     fi

[Dave Young]

On 08/07/18 at 03:49pm, Kairui Song wrote:
> We test if to include the drm module or not by testing if there are any
> drm entry in sysfs. But there is an exception for hyper-v, DRM module
> take care of hyperv's framebuffer driver as well but hyperv_fb will
> not create any drm entry. So currently we got black screen on
> hyperv guest.
> Fix by detect hyperv's special entry as well.
>
> dracut-module-setup.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index d1f9f5f..a10244b 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -20,7 +20,7 @@ check() {
>  depends() {
>      local _dep="base shutdown"
> if [ -n "$( find /sys/devices -name drm )" ]; then
> if [ -n "$( find /sys/devices -name drm )" ] || [ -d /sys/module/hyperv_fb ]; then
>     _dep="$_dep drm"
> fi
>
> -- 
> 2.17.1
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Ack

Thanks
Dave