add REDIRECT

hc

2024-10-09 05e59e5fb0064c97a1c10921ecd549f2d4a58565

 kernel/drivers/hid/intel-ish-hid/ishtp/dma-if.c
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@@ -104,6 +104,11 @@
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 	int required_slots = (size / DMA_SLOT_SIZE)
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 		+ 1 * (size % DMA_SLOT_SIZE != 0);
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+	if (!dev->ishtp_dma_tx_map) {
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+		dev_err(dev->devc, "Fail to allocate Tx map\n");
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+		return NULL;
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+	}
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+
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 	spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);
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 	for (i = 0; i <= (dev->ishtp_dma_num_slots - required_slots); i++) {
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 		free = 1;
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@@ -150,6 +155,11 @@
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 		return;
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 	}
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+	if (!dev->ishtp_dma_tx_map) {
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+		dev_err(dev->devc, "Fail to allocate Tx map\n");
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+		return;
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+	}
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+
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 	i = (msg_addr - dev->ishtp_host_dma_tx_buf) / DMA_SLOT_SIZE;
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 	spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);
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 	for (j = 0; j < acked_slots; j++) {