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ps2hid: give up on PS/2 if trying to empty input buffer doesn't work after 1024 tries

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This commit is contained in:
K. Lange 2021-06-13 15:57:15 +09:00
parent b5da48f5a9
commit 2eb83c5ecd
1 changed files with 10 additions and 1 deletions
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11
kernel/arch/x86_64/ps2hid.c
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@ -320,7 +320,16 @@ void ps2hid_install(void) {
ps2_command(PS2_DISABLE_PORT2);
/* Clear the input buffer. */
while ((inportb(PS2_STATUS) & 1)) inportb(PS2_DATA);
size_t timeout = 1024; /* Can't imagine a buffer with more than that being full... */
while ((inportb(PS2_STATUS) & 1) && timeout > 0) {
timeout--;
inportb(PS2_DATA);
}
if (timeout == 0) {
printf("ps2hid: probably don't actually have PS/2.\n");
return;
}
/* Enable interrupt lines, enable translation. */
status = ps2_command_response(PS2_READ_CONFIG);