diff options
| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2013-05-23 13:55:35 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-05-23 12:59:25 +0200 |
| commit | edc3d8848dc9fe2a470316363dab8ef211d77e01 (patch) | |
| tree | d90688ab89d3d9f4b5632ca105d1cff3fba532b5 /drivers/gpu/drm/i915/intel_overlay.c | |
| parent | 039735369c8fb105d0a090c949b7f894425121d8 (diff) | |
drm/i915: avoid big kmallocs on reading error state
Sometimes when user is trying to get error state out from
debugfs after gpu hang, the memory is low and/or fragmented
enough that kmalloc in seq_file will fail.
Prevent big kmalloc by avoiding seq_file and instead convert
error state to string in smaller chunks.
v2: better alloc flags, better truncate, correct
locking, and error handling improvements (Chris Wilson)
v3: printf annotations (Daniel Vetter)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_overlay.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_overlay.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c index 67a2501d519d..836794b68fc6 100644 --- a/drivers/gpu/drm/i915/intel_overlay.c +++ b/drivers/gpu/drm/i915/intel_overlay.c @@ -1485,14 +1485,15 @@ err: } void -intel_overlay_print_error_state(struct seq_file *m, struct intel_overlay_error_state *error) +intel_overlay_print_error_state(struct drm_i915_error_state_buf *m, + struct intel_overlay_error_state *error) { - seq_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n", - error->dovsta, error->isr); - seq_printf(m, " Register file at 0x%08lx:\n", - error->base); + i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n", + error->dovsta, error->isr); + i915_error_printf(m, " Register file at 0x%08lx:\n", + error->base); -#define P(x) seq_printf(m, " " #x ": 0x%08x\n", error->regs.x) +#define P(x) i915_error_printf(m, " " #x ": 0x%08x\n", error->regs.x) P(OBUF_0Y); P(OBUF_1Y); P(OBUF_0U); |