This patch fixes the following device init failure:
[ 0.945942] usbcore: registered new interface driver sisusb
[ 0.947349] i8042: PNP: No PS/2 controller found. Probing ports directly.
[ 0.949033] i8042: [0] 20 -> i8042 (command)
[ 0.950370] i8042: [57] -- i8042 (timeout)
[ 1.521143] i8042: Can't read CTR while initializing i8042
[ 1.522495] i8042: probe of i8042 failed with error -5
The kbd_out() function was taking 32 bits instead of 8 bits for 'outb'. This
caused kbd_write_command() to receive bogus 'val' which meant that
I8042_CMD_CTL_RCTR case in the switch statement was never executed.
Cc: Ingo Molnar <mi...@elte.hu>
Cc: Sasha Levin <levinsasha...@gmail.com>
Signed-off-by: Pekka Enberg <penb...@kernel.org>
---
tools/kvm/hw/i8042.c | 48 +++++++++++++++++++++++++++++-------------------
1 files changed, 29 insertions(+), 19 deletions(-)
diff --git a/tools/kvm/hw/i8042.c b/tools/kvm/hw/i8042.c
index 934ef4e..42ed4ba 100644
--- a/tools/kvm/hw/i8042.c
+++ b/tools/kvm/hw/i8042.c
@@ -140,10 +140,7 @@ static void kbd_queue(u8 c)
kbd_update_irq();
}
-/*
- * This function is called when the OS issues a write to port 0x64
- */
-static void kbd_write_command(u32 val)
+static void kbd_write_command(u8 val)
{
switch (val) {
case I8042_CMD_CTL_RCTR:
@@ -451,27 +448,40 @@ void kbd_handle_ptr(int buttonMask, int x, int y,
rfbClientPtr cl)
*/
static bool kbd_in(struct ioport *ioport, struct kvm *kvm, u16 port, void
*data, int size, u32 count)
{
- u32 result;
-
- if (port == I8042_COMMAND_REG) {
- result = kbd_read_status();
- ioport__write8(data, (char)result);
- } else {
- result = kbd_read_data();
- ioport__write32(data, result);
+ switch (port) {
+ case I8042_COMMAND_REG: {
+ u8 value = kbd_read_status();
+ ioport__write8(data, value);
+ break;
+ }
+ case I8042_DATA_REG: {
+ u32 value = kbd_read_data();
+ ioport__write32(data, value);
+ break;
}
+ default:
+ break;
+ }
+
return true;
}
-/*
- * Called when the OS attempts to read from a keyboard port (0x60 or 0x64)
- */
static bool kbd_out(struct ioport *ioport, struct kvm *kvm, u16 port, void
*data, int size, u32 count)
{
- if (port == I8042_COMMAND_REG)
- kbd_write_command(*((u32 *)data));
- else
- kbd_write_data(*((u32 *)data));
+ switch (port) {
+ case I8042_COMMAND_REG: {
+ u8 value = ioport__read8(data);
+ kbd_write_command(value);
+ break;
+ }
+ case I8042_DATA_REG: {
+ u32 value = ioport__read32(data);
+ kbd_write_data(value);
+ break;
+ }
+ default:
+ break;
+ }
return true;
}
--
1.7.0.4
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