gpio: uapi: use 0xB4 as ioctl() major
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Message ID 1457600278-30124-1-git-send-email-linus.walleij@linaro.org
State New
Headers show

Commit Message

Linus Walleij March 10, 2016, 8:57 a.m. UTC
The previous 'o' is in conflict and not very orderly assigned.
We want to select an ioctl() major that does not conflict with
the existining ones.

Add the new reserved major (0xB4) to Documentation/ioctl/ioctl-number.txt

Fixes: 3c702e9987e2 ("gpio: add a userspace chardev ABI for GPIOs")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
This fixes a serious number space collission in the ABI, because
of my incompetence. Ideally I would augment the original commit,
but at this point I can not rebase my tree. The merged end result
will be OK.
---
 Documentation/ioctl/ioctl-number.txt | 1 +
 include/uapi/linux/gpio.h            | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

Patch
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diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 91261a32a573..9369d3b0f09a 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -319,6 +319,7 @@  Code  Seq#(hex)	Include File		Comments
 					<mailto:vgo@ratio.de>
 0xB1	00-1F	PPPoX			<mailto:mostrows@styx.uwaterloo.ca>
 0xB3	00	linux/mmc/ioctl.h
+0xB4	00-0F	linux/gpio.h		<mailto:linux-gpio@vger.kernel.org>
 0xC0	00-0F	linux/usb/iowarrior.h
 0xCA	00-0F	uapi/misc/cxl.h
 0xCA	80-8F	uapi/scsi/cxlflash_ioctl.h
diff --git a/include/uapi/linux/gpio.h b/include/uapi/linux/gpio.h
index dfe8ade2742d..d0a3cac72250 100644
--- a/include/uapi/linux/gpio.h
+++ b/include/uapi/linux/gpio.h
@@ -52,7 +52,7 @@  struct gpioline_info {
 	char consumer[32];
 };
 
-#define GPIO_GET_CHIPINFO_IOCTL _IOR('o', 0x01, struct gpiochip_info)
-#define GPIO_GET_LINEINFO_IOCTL _IOWR('o', 0x02, struct gpioline_info)
+#define GPIO_GET_CHIPINFO_IOCTL _IOR(0xB4, 0x01, struct gpiochip_info)
+#define GPIO_GET_LINEINFO_IOCTL _IOWR(0xB4, 0x02, struct gpioline_info)
 
 #endif /* _UAPI_GPIO_H_ */