habanalabs: prevent read/write from/to the device during hard reset (bc75d799) · Commits · 戴 / test

During hard reset we should not access the device except of necessary reset operations because the device might be stuck or unresponsive. Signed-off-by:

Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by:

Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by:

Oded Gabbay <oded.gabbay@gmail.com>

drivers/misc/habanalabs/goya/goya.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -4870,7 +4870,8 @@ static void goya_mmu_invalidate_cache(struct hl_device *hdev, bool is_hard,
		u32 status, timeout_usec;
		int rc;

		if (!(goya->hw_cap_initialized & HW_CAP_MMU))
		if (!(goya->hw_cap_initialized & HW_CAP_MMU) \|\|
		hdev->hard_reset_pending)
		return;

		/* no need in L1 only invalidation in Goya */
		@@ -4909,7 +4910,8 @@ static void goya_mmu_invalidate_cache_range(struct hl_device *hdev,
		u32 status, timeout_usec, inv_data, pi;
		int rc;

		if (!(goya->hw_cap_initialized & HW_CAP_MMU))
		if (!(goya->hw_cap_initialized & HW_CAP_MMU) \|\|
		hdev->hard_reset_pending)
		return;

		/* no need in L1 only invalidation in Goya */

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