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| author | Michael Brown | 2019-02-19 19:47:12 +0100 |
|---|---|---|
| committer | Michael Brown | 2019-02-19 20:02:11 +0100 |
| commit | 64b4452bca04af433f1c98ab782c0e93cd5c88c0 (patch) | |
| tree | aad8c645e893ac233481e64de6ea8b3a69a817f9 /src/interface/efi/efiprefix.c | |
| parent | [init] Show startup and shutdown function names in debug messages (diff) | |
| download | ipxe-64b4452bca04af433f1c98ab782c0e93cd5c88c0.tar.gz ipxe-64b4452bca04af433f1c98ab782c0e93cd5c88c0.tar.xz ipxe-64b4452bca04af433f1c98ab782c0e93cd5c88c0.zip | |
[efi] Blacklist the Dell Ip4ConfigDxe driver
On a Dell OptiPlex 7010, calling DisconnectController() on the LOM
device handle will lock up the system. Debugging shows that execution
is trapped in an infinite loop that is somehow trying to reconnect
drivers (without going via ConnectController()).
The problem can be reproduced in the UEFI shell with no iPXE code
present, by using the "disconnect" command. Experimentation shows
that the only fix is to unload (rather than just disconnect) the
"Ip4ConfigDxe" driver.
Add the concept of a blacklist of UEFI drivers that will be
automatically unloaded when iPXE runs as an application, and add the
Dell Ip4ConfigDxe driver to this blacklist.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/interface/efi/efiprefix.c')
| -rw-r--r-- | src/interface/efi/efiprefix.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/interface/efi/efiprefix.c b/src/interface/efi/efiprefix.c index 18b931e6..de3572c7 100644 --- a/src/interface/efi/efiprefix.c +++ b/src/interface/efi/efiprefix.c @@ -27,6 +27,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #include <ipxe/efi/efi_snp.h> #include <ipxe/efi/efi_autoboot.h> #include <ipxe/efi/efi_watchdog.h> +#include <ipxe/efi/efi_blacklist.h> /** * EFI entry point @@ -75,6 +76,10 @@ EFI_STATUS EFIAPI _efi_start ( EFI_HANDLE image_handle, */ static int efi_probe ( struct root_device *rootdev __unused ) { + /* Unloaded any blacklisted drivers */ + efi_unload_blacklist(); + + /* Connect our drivers */ return efi_driver_connect_all(); } @@ -85,6 +90,7 @@ static int efi_probe ( struct root_device *rootdev __unused ) { */ static void efi_remove ( struct root_device *rootdev __unused ) { + /* Disconnect our drivers */ efi_driver_disconnect_all(); } |