From: Manivannan Sadhasivam <mani@kernel.org>
To: Paul Davey <paul.davey@alliedtelesis.co.nz>
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] bus: mhi: Fix pm_state conversion to string
Date: Fri, 18 Jun 2021 11:42:51 +0530 [thread overview]
Message-ID: <20210618054731.GJ3682@workstation> (raw)
In-Reply-To: <20210618033132.24839-2-paul.davey@alliedtelesis.co.nz>
On Fri, Jun 18, 2021 at 03:31:31PM +1200, Paul Davey wrote:
> On big endian architectures the mhi debugfs files which report pm state
> give "Invalid State" for all states.
>
> Fix to_mhi_pm_state_str by using a local unsigned long as an intemediate
> to pass the state to find_last_bit to avoid endianness issues with cast
> from enum mhi_pm_state * to unsigned long *.
>
> Signed-off-by: Paul Davey <paul.davey@alliedtelesis.co.nz>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Thanks,
Mani
> ---
> drivers/bus/mhi/core/init.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index c81b377fca8f..87cc0c449078 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -79,7 +79,8 @@ static const char * const mhi_pm_state_str[] = {
>
> const char *to_mhi_pm_state_str(enum mhi_pm_state state)
> {
> - int index = find_last_bit((unsigned long *)&state, 32);
> + unsigned long tmp = state;
> + int index = find_last_bit((unsigned long *)&tmp, 32);
>
> if (index >= ARRAY_SIZE(mhi_pm_state_str))
> return "Invalid State";
> --
> 2.32.0
>
next prev parent reply other threads:[~2021-06-18 6:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 3:31 [PATCH 0/2] bus: mhi: Fix MHI on big endian architectures Paul Davey
2021-06-18 3:31 ` [PATCH 1/2] bus: mhi: Fix pm_state conversion to string Paul Davey
2021-06-18 6:12 ` Manivannan Sadhasivam [this message]
2021-06-18 21:41 ` Hemant Kumar
2021-06-18 3:31 ` [PATCH 2/2] bus: mhi: Fix MHI DMA structure endianness Paul Davey
2021-06-18 6:29 ` Manivannan Sadhasivam
2021-06-18 6:32 ` Manivannan Sadhasivam
2021-06-22 1:31 ` Bhaumik Bhatt
2021-06-18 5:44 ` [PATCH 0/2] bus: mhi: Fix MHI on big endian architectures Manivannan Sadhasivam
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