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path: root/drivers/hid/intel-ish-hid/ishtp/dma-if.c
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Diffstat (limited to 'drivers/hid/intel-ish-hid/ishtp/dma-if.c')
-rw-r--r--drivers/hid/intel-ish-hid/ishtp/dma-if.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp/dma-if.c b/drivers/hid/intel-ish-hid/ishtp/dma-if.c
index 40554c8daca0..00046cbfd4ed 100644
--- a/drivers/hid/intel-ish-hid/ishtp/dma-if.c
+++ b/drivers/hid/intel-ish-hid/ishtp/dma-if.c
@@ -104,6 +104,11 @@ void *ishtp_cl_get_dma_send_buf(struct ishtp_device *dev,
int required_slots = (size / DMA_SLOT_SIZE)
+ 1 * (size % DMA_SLOT_SIZE != 0);
+ if (!dev->ishtp_dma_tx_map) {
+ dev_err(dev->devc, "Fail to allocate Tx map\n");
+ return NULL;
+ }
+
spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);
for (i = 0; i <= (dev->ishtp_dma_num_slots - required_slots); i++) {
free = 1;
@@ -150,6 +155,11 @@ void ishtp_cl_release_dma_acked_mem(struct ishtp_device *dev,
return;
}
+ if (!dev->ishtp_dma_tx_map) {
+ dev_err(dev->devc, "Fail to allocate Tx map\n");
+ return;
+ }
+
i = (msg_addr - dev->ishtp_host_dma_tx_buf) / DMA_SLOT_SIZE;
spin_lock_irqsave(&dev->ishtp_dma_tx_lock, flags);
for (j = 0; j < acked_slots; j++) {