Merge tag 'char-misc-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the large set of char/misc driver patches for 5.8-rc1

  Included in here are:

   - habanalabs driver updates, loads

   - mhi bus driver updates

   - extcon driver updates

   - clk driver updates (approved by the clock maintainer)

   - firmware driver updates

   - fpga driver updates

   - gnss driver updates

   - coresight driver updates

   - interconnect driver updates

   - parport driver updates (it's still alive!)

   - nvmem driver updates

   - soundwire driver updates

   - visorbus driver updates

   - w1 driver updates

   - various misc driver updates

  In short, loads of different driver subsystem updates along with the
  drivers as well.

  All have been in linux-next for a while with no reported issues"

* tag 'char-misc-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (233 commits)
  habanalabs: correctly cast u64 to void*
  habanalabs: initialize variable to default value
  extcon: arizona: Fix runtime PM imbalance on error
  extcon: max14577: Add proper dt-compatible strings
  extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()'
  extcon: remove redundant assignment to variable idx
  w1: omap-hdq: print dev_err if irq flags are not cleared
  w1: omap-hdq: fix interrupt handling which did show spurious timeouts
  w1: omap-hdq: fix return value to be -1 if there is a timeout
  w1: omap-hdq: cleanup to add missing newline for some dev_dbg
  /dev/mem: Revoke mappings when a driver claims the region
  misc: xilinx-sdfec: convert get_user_pages() --> pin_user_pages()
  misc: xilinx-sdfec: cleanup return value in xsdfec_table_write()
  misc: xilinx-sdfec: improve get_user_pages_fast() error handling
  nvmem: qfprom: remove incorrect write support
  habanalabs: handle MMU cache invalidation timeout
  habanalabs: don't allow hard reset with open processes
  habanalabs: GAUDI does not support soft-reset
  habanalabs: add print for soft reset due to event
  habanalabs: improve MMU cache invalidation code
  ...

1 files changed, 29 insertions, 8 deletions

diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
index a72f766ca470..47da84a17719 100644
--- a/drivers/misc/habanalabs/memory.c
+++ b/drivers/misc/habanalabs/memory.c
@@ -886,6 +886,7 @@ static int map_device_va(struct hl_ctx *ctx, struct hl_mem_in *args,
 
 		vm_type = (enum vm_type_t *) userptr;
 		hint_addr = args->map_host.hint_addr;
+		handle = phys_pg_pack->handle;
 	} else {
 		handle = lower_32_bits(args->map_device.handle);
 
@@ -954,10 +955,17 @@ static int map_device_va(struct hl_ctx *ctx, struct hl_mem_in *args,
 		goto map_err;
 	}
 
-	hdev->asic_funcs->mmu_invalidate_cache(hdev, false, *vm_type);
+	rc = hdev->asic_funcs->mmu_invalidate_cache(hdev, false, *vm_type);
 
 	mutex_unlock(&ctx->mmu_lock);
 
+	if (rc) {
+		dev_err(hdev->dev,
+			"mapping handle %u failed due to MMU cache invalidation\n",
+			handle);
+		goto map_err;
+	}
+
 	ret_vaddr += phys_pg_pack->offset;
 
 	hnode->ptr = vm_type;
@@ -1015,7 +1023,7 @@ static int unmap_device_va(struct hl_ctx *ctx, u64 vaddr, bool ctx_free)
 	struct hl_va_range *va_range;
 	enum vm_type_t *vm_type;
 	bool is_userptr;
-	int rc;
+	int rc = 0;
 
 	/* protect from double entrance */
 	mutex_lock(&ctx->mem_hash_lock);
@@ -1083,21 +1091,34 @@ static int unmap_device_va(struct hl_ctx *ctx, u64 vaddr, bool ctx_free)
 	 * at the loop end rather than for each iteration
 	 */
 	if (!ctx_free)
-		hdev->asic_funcs->mmu_invalidate_cache(hdev, true, *vm_type);
+		rc = hdev->asic_funcs->mmu_invalidate_cache(hdev, true,
+								*vm_type);
 
 	mutex_unlock(&ctx->mmu_lock);
 
 	/*
-	 * No point in maintaining the free VA block list if the context is
-	 * closing as the list will be freed anyway
+	 * If the context is closing we don't need to check for the MMU cache
+	 * invalidation return code and update the VA free list as in this flow
+	 * we invalidate the MMU cache outside of this unmap function and the VA
+	 * free list will be freed anyway.
 	 */
 	if (!ctx_free) {
-		rc = add_va_block(hdev, va_range, vaddr,
-					vaddr + phys_pg_pack->total_size - 1);
+		int tmp_rc;
+
 		if (rc)
+			dev_err(hdev->dev,
+				"unmapping vaddr 0x%llx failed due to MMU cache invalidation\n",
+				vaddr);
+
+		tmp_rc = add_va_block(hdev, va_range, vaddr,
+					vaddr + phys_pg_pack->total_size - 1);
+		if (tmp_rc) {
 			dev_warn(hdev->dev,
 					"add va block failed for vaddr: 0x%llx\n",
 					vaddr);
+			if (!rc)
+				rc = tmp_rc;
+		}
 	}
 
 	atomic_dec(&phys_pg_pack->mapping_cnt);
@@ -1108,7 +1129,7 @@ static int unmap_device_va(struct hl_ctx *ctx, u64 vaddr, bool ctx_free)
 		dma_unmap_host_va(hdev, userptr);
 	}
 
-	return 0;
+	return rc;
 
 mapping_cnt_err:
 	if (is_userptr)