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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2019-11-18 09:41:08 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2019-11-21 11:35:47 +0200 |
| commit | 5feccddcf9922ee3c25587d5e609bf58503ad93e (patch) | |
| tree | 9e6805e17b262b99da99005959b6e3874a4120c0 /drivers/misc | |
| parent | 55f6d680970ea922d4ee23d5ac88d3a8046221fb (diff) | |
| download | linux-rt-5feccddcf9922ee3c25587d5e609bf58503ad93e.tar.gz | |
habanalabs: add more protection of device during reset
Prevent accesses to the device (register read/write) from debugfs entries
during reset as that can cause the device to get stuck.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Tomer Tayar <ttayar@habana.ai>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/habanalabs/debugfs.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c index 1cf75010a379..20413e350343 100644 --- a/drivers/misc/habanalabs/debugfs.c +++ b/drivers/misc/habanalabs/debugfs.c @@ -528,6 +528,12 @@ static int engines_show(struct seq_file *s, void *data) struct hl_dbg_device_entry *dev_entry = entry->dev_entry; struct hl_device *hdev = dev_entry->hdev; + if (atomic_read(&hdev->in_reset)) { + dev_warn_ratelimited(hdev->dev, + "Can't check device idle during reset\n"); + return 0; + } + hdev->asic_funcs->is_device_idle(hdev, NULL, s); return 0; @@ -640,6 +646,11 @@ static ssize_t hl_data_read32(struct file *f, char __user *buf, u32 val; ssize_t rc; + if (atomic_read(&hdev->in_reset)) { + dev_warn_ratelimited(hdev->dev, "Can't read during reset\n"); + return 0; + } + if (*ppos) return 0; @@ -669,6 +680,11 @@ static ssize_t hl_data_write32(struct file *f, const char __user *buf, u32 value; ssize_t rc; + if (atomic_read(&hdev->in_reset)) { + dev_warn_ratelimited(hdev->dev, "Can't write during reset\n"); + return 0; + } + rc = kstrtouint_from_user(buf, count, 16, &value); if (rc) return rc; |