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drm: Copy back ioctl data to userspace regardless of return code.

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Fixes a regression from commit 9d5b3ffc42f7820e8ee07705496955e4c2c38dd9
('drm: fixup some of the ioctl function exit paths'): The vblank ioctl
needs to update the userspace parameters when interrupted by a signal,
which was prevented by the return code check. This could cause the X
server to hang in drmWaitVBlank().

Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Michel Dänzer 2009-05-20 13:32:00 +02:00 committed by Jesse Barnes
parent b674137755
commit 9b6fe313bf
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_drv.c
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@ -481,7 +481,7 @@ int drm_ioctl(struct inode *inode, struct file *filp,
}
retcode = func(dev, kdata, file_priv);
if ((retcode == 0) && (cmd & IOC_OUT)) {
if (cmd & IOC_OUT) {
if (copy_to_user((void __user *)arg, kdata,
_IOC_SIZE(cmd)) != 0)
retcode = -EFAULT;