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drm: Print the pid when debug logging an ioctl error. 

When we debug print what ioctl we're calling into, we include the pid.
If you have multiple processes rendering simulataneously, the error
return also needs the pid so you can see which of the ioctl calls was
the one to fail.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180130215643.11016-1-eric@anholt.net
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Eric Anholt 2018-01-30 13:56:43 -08:00
parent 9569002a39
commit 9c950e468c
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_ioctl.c
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@ -848,7 +848,7 @@ long drm_ioctl(struct file *filp,
if (kdata != stack_kdata)
kfree(kdata);
if (retcode)
DRM_DEBUG("ret = %d\n", retcode);
DRM_DEBUG("pid=%d, ret = %d\n", task_pid_nr(current), retcode);
return retcode;
}
EXPORT_SYMBOL(drm_ioctl);