Merge tag 'pwm/for-6.19-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux

Pull pwm fixes and a maintainer update from Uwe Kleine-König:

- pwm: Ensure ioctl() returns a negative errno on error

This affects two ioctls on /dev/pwmchipX where the return value of
copy_to_user() was passed to userspace. This is fixed to return
-EFAULT now instead.

- pwm: max7360: Populate missing .sizeof_wfhw in max7360_pwm_ops

This fixes an oversight in the original commit that added support for
the max7360 driver (d93a75d94b79: "pwm: max7360: Add MAX7360 PWM
support"). There is no user-visible effect because the .sizeof_wfhw
member is just a safe guard that the memory provided by the core is
big enough. While it currently is big enough and there is no reason
to assume that will change, doing that correctly is necessary.

- MAINTAINERS: Add Michal Wilczynski as reviewer for PWM rust drivers

Michal cares for the Rust parts of the pwm subsystem. Several of the
patches sent recently for the (for now) only Rust pwm driver did not
add Michal to Cc which resulted in the patches waiting for review as
I thought Michal would care but he wasn't aware of them.

* tag 'pwm/for-6.19-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux:
MAINTAINERS: Add myself as reviewer for PWM rust drivers
pwm: max7360: Populate missing .sizeof_wfhw in max7360_pwm_ops
pwm: Ensure ioctl() returns a negative errno on error

MAINTAINERS

···
 F:	rust/helpers/pwm.c
 F:	rust/kernel/pwm.rs
 
+PWM SUBSYSTEM DRIVERS [RUST]
+R:	Michal Wilczynski <[e-mail]>
+F:	drivers/pwm/*.rs
+
 PXA GPIO DRIVER
 M:	Robert Jarzmik <[e-mail]>
 L:	[e-mail]

drivers/pwm/core.c

···
 				.duty_offset_ns = wf.duty_offset_ns,
 			};
 
-			return copy_to_user((struct pwmchip_waveform __user *)arg,
-					    &cwf, sizeof(cwf));
+			ret = copy_to_user((struct pwmchip_waveform __user *)arg,
+					   &cwf, sizeof(cwf));
+			return ret ? -EFAULT : 0;
 		}
 
 	case PWM_IOCTL_GETWF:
···
 				.duty_offset_ns = wf.duty_offset_ns,
 			};
 
-			return copy_to_user((struct pwmchip_waveform __user *)arg,
-					    &cwf, sizeof(cwf));
+			ret = copy_to_user((struct pwmchip_waveform __user *)arg,
+					   &cwf, sizeof(cwf));
+			return ret ? -EFAULT : 0;
 		}
 
 	case PWM_IOCTL_SETROUNDEDWF:

drivers/pwm/pwm-max7360.c

···
 }
 
 static const struct pwm_ops max7360_pwm_ops = {
+	.sizeof_wfhw = sizeof(struct max7360_pwm_waveform),
 	.request = max7360_pwm_request,
 	.round_waveform_tohw = max7360_pwm_round_waveform_tohw,
 	.round_waveform_fromhw = max7360_pwm_round_waveform_fromhw,