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SubjectRe: [PATCH 1/3] PCI: apple: GPIO handling nitfixes
On Mon, 02 May 2022 10:38:30 +0100,
Hector Martin <marcan@marcan.st> wrote:
>
> - Use devm managed GPIO getter
> - GPIO ops can sleep in this context
>
> Fixes: 1e33888fbe44 ("PCI: apple: Add initial hardware bring-up")
> Cc: stable@vger.kernel.org

Why the Cc: stable? I'd guess that at a push, the devm_*() usage help
with potential memory leaks when the driver fails to probe, but it
would be good to call that out in the commit message.

> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
> drivers/pci/controller/pcie-apple.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
> index a2c3c207a04b..e0c06c0ee731 100644
> --- a/drivers/pci/controller/pcie-apple.c
> +++ b/drivers/pci/controller/pcie-apple.c
> @@ -516,8 +516,8 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
> u32 stat, idx;
> int ret, i;
>
> - reset = gpiod_get_from_of_node(np, "reset-gpios", 0,
> - GPIOD_OUT_LOW, "PERST#");
> + reset = devm_gpiod_get_from_of_node(pcie->dev, np, "reset-gpios", 0,
> + GPIOD_OUT_LOW, "PERST#");
> if (IS_ERR(reset))
> return PTR_ERR(reset);
>
> @@ -541,7 +541,7 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
> rmw_set(PORT_APPCLK_EN, port->base + PORT_APPCLK);
>
> /* Assert PERST# before setting up the clock */
> - gpiod_set_value(reset, 1);
> + gpiod_set_value_cansleep(reset, 1);
>
> ret = apple_pcie_setup_refclk(pcie, port);
> if (ret < 0)
> @@ -552,7 +552,7 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
>
> /* Deassert PERST# */
> rmw_set(PORT_PERST_OFF, port->base + PORT_PERST);
> - gpiod_set_value(reset, 0);
> + gpiod_set_value_cansleep(reset, 0);
>
> /* Wait for 100ms after PERST# deassertion (PCIe r5.0, 6.6.1) */
> msleep(100);

Otherwise:

Acked-by: Marc Zyngier <maz@kernel.org>

M.

--
Without deviation from the norm, progress is not possible.

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