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Date: Thu, 14 Nov 2019 18:23:56 +0000 From: Omer Shpigelman <oshpigelman@...ana.ai> To: "oded.gabbay@...il.com" <oded.gabbay@...il.com> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: [PATCH 4/8] habanalabs: prevent read/write from/to the device during hard reset 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@...ana.ai> --- drivers/misc/habanalabs/goya/goya.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c index 3294a6a92f75..2935e84fe7d8 100644 --- a/drivers/misc/habanalabs/goya/goya.c +++ b/drivers/misc/habanalabs/goya/goya.c @@ -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 */ -- 2.17.1
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