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Commit cc37d8ef authored by Amitkumar Karwar's avatar Amitkumar Karwar Committed by Kalle Valo
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mwifiex: use pci_dma_sync_single* APIs 



On some platforms, driver is unable read sleep cookie signature even
if firmware has written it through DMA. The problem is fixed by using
pci_dma_sync_single* APIs while reading DMA buffer shared with firmware.

Signed-off-by: default avatarAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 3e668498

drivers/net/wireless/marvell/mwifiex/pcie.c

+10 −1
Original line number Original line Diff line number Diff line
@@ -439,9 +439,14 @@ static void mwifiex_delay_for_sleep_cookie(struct mwifiex_adapter *adapter, 
	struct pcie_service_card *card = adapter->card;

	struct pcie_service_card *card = adapter->card;

	u8 *buffer;

	u8 *buffer;

	u32 sleep_cookie, count;

	u32 sleep_cookie, count;

	struct sk_buff *cmdrsp = card->cmdrsp_buf;





	for (count = 0; count < max_delay_loop_cnt; count++) {

	for (count = 0; count < max_delay_loop_cnt; count++) {

		buffer = card->cmdrsp_buf->data;

		pci_dma_sync_single_for_cpu(card->dev,

					    MWIFIEX_SKB_DMA_ADDR(cmdrsp),

					    sizeof(sleep_cookie),

					    PCI_DMA_FROMDEVICE);

		buffer = cmdrsp->data;

		sleep_cookie = READ_ONCE(*(u32 *)buffer);

		sleep_cookie = READ_ONCE(*(u32 *)buffer);





		if (sleep_cookie == MWIFIEX_DEF_SLEEP_COOKIE) {

		if (sleep_cookie == MWIFIEX_DEF_SLEEP_COOKIE) {
@@ -449,6 +454,10 @@ static void mwifiex_delay_for_sleep_cookie(struct mwifiex_adapter *adapter, 
				    "sleep cookie found at count %d\n", count);

				    "sleep cookie found at count %d\n", count);

			break;

			break;

		}

		}

		pci_dma_sync_single_for_device(card->dev,

					       MWIFIEX_SKB_DMA_ADDR(cmdrsp),

					       sizeof(sleep_cookie),

					       PCI_DMA_FROMDEVICE);

		usleep_range(20, 30);

		usleep_range(20, 30);

	}

	}