From 1832f2d8ff69138aa70d3cb3b4ea3c2058e73aea Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 11 Sep 2018 21:59:08 +0200 Subject: compat_ioctl: move more drivers to compat_ptr_ioctl The .ioctl and .compat_ioctl file operations have the same prototype so they can both point to the same function, which works great almost all the time when all the commands are compatible. One exception is the s390 architecture, where a compat pointer is only 31 bit wide, and converting it into a 64-bit pointer requires calling compat_ptr(). Most drivers here will never run in s390, but since we now have a generic helper for it, it's easy enough to use it consistently. I double-checked all these drivers to ensure that all ioctl arguments are used as pointers or are ignored, but are not interpreted as integer values. Acked-by: Jason Gunthorpe Acked-by: Daniel Vetter Acked-by: Mauro Carvalho Chehab Acked-by: Greg Kroah-Hartman Acked-by: David Sterba Acked-by: Darren Hart (VMware) Acked-by: Jonathan Cameron Acked-by: Bjorn Andersson Acked-by: Dan Williams Signed-off-by: Arnd Bergmann --- drivers/dma-buf/dma-buf.c | 4 +--- drivers/dma-buf/sw_sync.c | 2 +- drivers/dma-buf/sync_file.c | 2 +- 3 files changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/dma-buf') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 433d91d710e4..5b8797be80df 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -415,9 +415,7 @@ static const struct file_operations dma_buf_fops = { .llseek = dma_buf_llseek, .poll = dma_buf_poll, .unlocked_ioctl = dma_buf_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = dma_buf_ioctl, -#endif + .compat_ioctl = compat_ptr_ioctl, .show_fdinfo = dma_buf_show_fdinfo, }; diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index 6713cfb1995c..348b3a9170fa 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -408,5 +408,5 @@ const struct file_operations sw_sync_debugfs_fops = { .open = sw_sync_debugfs_open, .release = sw_sync_debugfs_release, .unlocked_ioctl = sw_sync_ioctl, - .compat_ioctl = sw_sync_ioctl, + .compat_ioctl = compat_ptr_ioctl, }; diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index 25c5c071645b..76fb072c22dc 100644 --- a/drivers/dma-buf/sync_file.c +++ b/drivers/dma-buf/sync_file.c @@ -480,5 +480,5 @@ static const struct file_operations sync_file_fops = { .release = sync_file_release, .poll = sync_file_poll, .unlocked_ioctl = sync_file_ioctl, - .compat_ioctl = sync_file_ioctl, + .compat_ioctl = compat_ptr_ioctl, }; -- cgit v1.2.3