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loader.efi: conout->QueryMode() can fail to return screen dimensions

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Some systems are reported to fail to report screen dimensions unless the
screen mode is set first.
This commit is contained in:
Toomas Soome 2020-03-27 18:01:01 +00:00
parent 73531a2abd
commit db31623660
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=359372
1 changed files with 13 additions and 5 deletions
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18
stand/efi/libefi/efi_console.c
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@ -388,10 +388,18 @@ efi_cons_probe(struct console *cp)
conout = ST->ConOut;
conin = ST->ConIn;
status = BS->OpenProtocol(ST->ConsoleInHandle, &simple_input_ex_guid,
(void **)&coninex, IH, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (status != EFI_SUCCESS)
coninex = NULL;
/*
* Call SetMode to work around buggy firmware.
*/
status = conout->SetMode(conout, conout->Mode->Mode);
if (coninex == NULL) {
status = BS->OpenProtocol(ST->ConsoleInHandle,
&simple_input_ex_guid, (void **)&coninex,
IH, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (status != EFI_SUCCESS)
coninex = NULL;
}
cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
}
@ -824,7 +832,7 @@ efi_cons_update_mode(void)
char env[8];
status = conout->QueryMode(conout, conout->Mode->Mode, &cols, &rows);
if (EFI_ERROR(status)) {
if (EFI_ERROR(status) || cols * rows == 0) {
cols = 80;
rows = 24;
}