diff options
Diffstat (limited to 'target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch')
-rw-r--r-- | target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch b/target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch new file mode 100644 index 0000000000..bf6fdf1d49 --- /dev/null +++ b/target/linux/ramips/patches-5.4/0113-staging-mt7621-pci-be-sure-gpio-descriptor-is-null-o.patch @@ -0,0 +1,33 @@ +From 87068309300c707d659ce79232eae827604804a4 Mon Sep 17 00:00:00 2001 +From: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Date: Fri, 20 Mar 2020 12:01:23 +0100 +Subject: [PATCH] staging: mt7621-pci: be sure gpio descriptor is null on fails + +Function 'devm_gpiod_get_index_optional' returns NULL if the +descriptor is invalid and the error associated for the error +pointer is ENOENT. Sometimes if the pin is just assigned the +error associated for the pointer might not be ENOENT but other. +In order to avoid weirds behaviours if this happen set descriptor +to NULL in the driver port structure. + +Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Link: https://lore.kernel.org/r/20200320110123.9907-6-sergio.paracuellos@gmail.com +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/staging/mt7621-pci/pci-mt7621.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +--- a/drivers/staging/mt7621-pci/pci-mt7621.c ++++ b/drivers/staging/mt7621-pci/pci-mt7621.c +@@ -363,8 +363,10 @@ static int mt7621_pcie_parse_port(struct + + port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot, + GPIOD_OUT_LOW); +- if (IS_ERR(port->gpio_rst)) ++ if (IS_ERR(port->gpio_rst)) { + dev_notice(dev, "Failed to get GPIO for PCIe%d\n", slot); ++ port->gpio_rst = NULL; ++ } + + port->slot = slot; + port->pcie = pcie; |