NAK: [PATCH 1/1][SRU][OEM-OSP1-B][F][Unstable] UBUNTU: SAUCE: Input: i8042 - Fix the selftest retry logic
You-Sheng Yang
vicamo.yang at canonical.com
Mon Mar 16 08:14:18 UTC 2020
We're to propose a V2 that preserves fault tolerance as the original
code does.
You-Sheng Yang
On 2020-03-10 10:38, AceLan Kao wrote:
> BugLink: https://bugs.launchpad.net/bugs/1866734
>
> It returns -NODEV at the first selftest timeout, so the retry logic
> doesn't work. Move the return outside of the while loop to make it real
> retry 5 times before returns -ENODEV.
>
> BTW, the origin loop will retry 6 times, also fix this.
>
> Signed-off-by: AceLan Kao <acelan.kao at canonical.com>
> ---
> drivers/input/serio/i8042.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
> index 1e29408491eb..c64f43ebe56a 100644
> --- a/drivers/input/serio/i8042.c
> +++ b/drivers/input/serio/i8042.c
> @@ -937,10 +937,9 @@ static int i8042_controller_selftest(void)
> */
> do {
>
> - if (i8042_command(¶m, I8042_CMD_CTL_TEST)) {
> - pr_info("i8042 controller selftest timeout\n");
> - return -ENODEV;
> - }
> + if (i8042_command(¶m, I8042_CMD_CTL_TEST))
> + pr_info("i8042 controller selftest timeout (%d/5)\n",
> + i+1);
>
> if (param == I8042_RET_CTL_TEST)
> return 0;
> @@ -948,7 +947,9 @@ static int i8042_controller_selftest(void)
> dbg("i8042 controller selftest: %#x != %#x\n",
> param, I8042_RET_CTL_TEST);
> msleep(50);
> - } while (i++ < 5);
> + } while (++i < 5);
> + if (i == 5)
> + return -ENODEV;
>
> #ifdef CONFIG_X86
> /*
>
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